organic compounds
Dimethyl [(4-fluorophenyl)(6-methoxybenzothiazol-2-ylamino)methyl]phosphonate
aCollege of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China, and bKey Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, People's Republic of China
*Correspondence e-mail: jxndspxy74@yahoo.cn
In the molecule of title compound, C17H18FN2O4PS, both the benzene ring with its conjunction C atom and the benzothiazole ring with its conjunction N atom are close to planar (the maximum deviations are 0.0267 and 0.0427 Å for the benzene and benzothiazole rings, respectively), the dihedral angle between the planes of the benzothiazole and benzene rings is 119.05 (3)°. The molecular packing is stabilized by intermolecular N—H⋯O, C—H⋯N and C—H⋯F hydrogen bonding, and by C—H⋯π and π–π stacking interactions [centroid–centroid distances = 2.99 (2), 2.96 (3), 2.88 (2) and 3.773 (4) Å].
Related literature
For the biological activity of α-aminophosphonate derivatives, see: Kafarski & Lejczak (2001); De Lombaert et al. (1995); Du et al., (1999). For activities of α-aminophosphonate derivatives containing an F atom and benzothiazole or iaoxazole units, see: Yang et al. (2005); Song et al. (2005); Jin et al. (2006). For related structures, see: Fang et al. (2009); Yang et al. (2005); Jin et al. (2006); Song et al. (2005); Alvarez et al. (2005); Chen & Li (1987); Li et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536809015384/at2769sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809015384/at2769Isup2.hkl
A mixture of 2-amino-6-methoxylbenzothiazole (0.9010 g, 5 mmol) and 4-fluorobenzaldehyde (0.6205 g, 5 mmol) and 20 ml toluene in a 50 ml dry flask affiliated a water separator was refluxed and stirred for 6 h. Toluene was removed by water separator and then dimethylphosphate (0.88 g, 8 mmol) was added into the flask, the reaction mixture was refluxed in a nonsolvent condition for 5 h. Residue was washed with water, filtered, dried, and crystallized three times from ethanol yielding title compound as colorless solid. The crystal suitable for X-ray analysis was obtained by slow evaporation of an anhydrous ethanol at room temperature over a period of ten days.
H atoms were placed in calculated positions and were treated as riding on the parent C atoms with C—H = 0.93 - 0.987 Å; N—H = 0.86 Å, and with Uiso(H) = 1.2Ueq(C) for CH2, CH, NH, and 1.5Ueq(C) for CH3 .
Data collection: APEX2 (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The structure of the title compound, showing as 50% probability displacement ellipsoids. | |
Fig. 2. A packing view of the title compound. N—H···O, C—H···O, C—H···N and C—H···F hydrogen bonds, C—H···π and π-π stacking interactions are shown as dashed lines. |
C17H18FN2O4PS | F(000) = 1648 |
Mr = 396.36 | Dx = 1.385 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 5837 reflections |
a = 19.761 (5) Å | θ = 2.8–27.9° |
b = 15.781 (4) Å | µ = 0.29 mm−1 |
c = 14.395 (4) Å | T = 296 K |
β = 122.109 (3)° | Block, colourless |
V = 3802.4 (16) Å3 | 0.30 × 0.26 × 0.22 mm |
Z = 8 |
Bruker APEXII area-detector diffractometer | 3428 independent reflections |
Radiation source: fine-focus sealed tube | 2477 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.039 |
ϕ and ω scans | θmax = 25.2°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −23→23 |
Tmin = 0.919, Tmax = 0.939 | k = −18→18 |
9669 measured reflections | l = −15→17 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0545P)2 + 1.1262P] where P = (Fo2 + 2Fc2)/3 |
3428 reflections | (Δ/σ)max < 0.001 |
238 parameters | Δρmax = 0.22 e Å−3 |
0 restraints | Δρmin = −0.26 e Å−3 |
C17H18FN2O4PS | V = 3802.4 (16) Å3 |
Mr = 396.36 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 19.761 (5) Å | µ = 0.29 mm−1 |
b = 15.781 (4) Å | T = 296 K |
c = 14.395 (4) Å | 0.30 × 0.26 × 0.22 mm |
β = 122.109 (3)° |
Bruker APEXII area-detector diffractometer | 3428 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2477 reflections with I > 2σ(I) |
Tmin = 0.919, Tmax = 0.939 | Rint = 0.039 |
9669 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 0 restraints |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.22 e Å−3 |
3428 reflections | Δρmin = −0.26 e Å−3 |
238 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
S1 | 0.07360 (4) | 0.28313 (4) | 0.06124 (5) | 0.0510 (2) | |
P1 | 0.20273 (4) | 0.09893 (4) | −0.09266 (5) | 0.0483 (2) | |
N2 | 0.06939 (11) | 0.11776 (12) | 0.06276 (16) | 0.0477 (5) | |
C5 | 0.10708 (13) | 0.18124 (14) | 0.05470 (17) | 0.0421 (5) | |
C4 | 0.00865 (13) | 0.14714 (14) | 0.07713 (18) | 0.0445 (5) | |
C6 | 0.00177 (13) | 0.23554 (14) | 0.07921 (17) | 0.0438 (5) | |
C7 | −0.05321 (14) | 0.27298 (16) | 0.09682 (19) | 0.0524 (6) | |
H7 | −0.0568 | 0.3317 | 0.0981 | 0.063* | |
C1 | −0.10315 (14) | 0.22182 (16) | 0.11256 (19) | 0.0506 (6) | |
C3 | −0.04236 (14) | 0.09767 (16) | 0.0913 (2) | 0.0571 (7) | |
H3 | −0.0395 | 0.0390 | 0.0890 | 0.069* | |
C2 | −0.09822 (15) | 0.13484 (16) | 0.1089 (2) | 0.0563 (6) | |
H2 | −0.1326 | 0.1009 | 0.1184 | 0.068* | |
N1 | 0.16956 (11) | 0.17525 (12) | 0.04083 (17) | 0.0524 (5) | |
H1 | 0.1923 | 0.2209 | 0.0382 | 0.063* | |
C8 | 0.19929 (13) | 0.09419 (14) | 0.03023 (19) | 0.0452 (6) | |
H8 | 0.1605 | 0.0505 | 0.0196 | 0.054* | |
C9 | 0.27995 (14) | 0.06879 (14) | 0.12740 (18) | 0.0452 (6) | |
C11 | 0.37489 (18) | −0.04111 (18) | 0.2316 (2) | 0.0659 (8) | |
H11 | 0.3884 | −0.0982 | 0.2439 | 0.079* | |
C10 | 0.30051 (17) | −0.01584 (16) | 0.1484 (2) | 0.0560 (6) | |
H10 | 0.2630 | −0.0567 | 0.1049 | 0.067* | |
C14 | 0.33614 (15) | 0.12855 (17) | 0.1936 (2) | 0.0625 (7) | |
H14 | 0.3237 | 0.1859 | 0.1810 | 0.075* | |
C12 | 0.42812 (17) | 0.0196 (2) | 0.2955 (2) | 0.0684 (8) | |
C13 | 0.41102 (17) | 0.1034 (2) | 0.2788 (3) | 0.0751 (9) | |
H13 | 0.4489 | 0.1435 | 0.3238 | 0.090* | |
F1 | 0.50137 (11) | −0.00510 (13) | 0.37934 (15) | 0.1064 (7) | |
O1 | −0.15552 (10) | 0.26361 (12) | 0.13111 (15) | 0.0658 (5) | |
C17 | −0.20925 (16) | 0.21423 (19) | 0.1466 (2) | 0.0707 (8) | |
H17A | −0.2437 | 0.1822 | 0.0813 | 0.106* | |
H17B | −0.2409 | 0.2511 | 0.1617 | 0.106* | |
H17C | −0.1794 | 0.1762 | 0.2071 | 0.106* | |
O2 | 0.24876 (11) | 0.17048 (11) | −0.09456 (13) | 0.0612 (5) | |
O4 | 0.23331 (10) | 0.01050 (10) | −0.10441 (13) | 0.0555 (4) | |
O3 | 0.11234 (11) | 0.09795 (13) | −0.18384 (15) | 0.0752 (6) | |
C16 | 0.31296 (19) | −0.0033 (2) | −0.0807 (3) | 0.0886 (10) | |
H16A | 0.3292 | 0.0444 | −0.1056 | 0.133* | |
H16B | 0.3138 | −0.0536 | −0.1177 | 0.133* | |
H16C | 0.3490 | −0.0101 | −0.0031 | 0.133* | |
C15 | 0.0861 (2) | 0.1088 (3) | −0.2974 (3) | 0.1293 (16) | |
H15A | 0.1166 | 0.1532 | −0.3040 | 0.194* | |
H15B | 0.0305 | 0.1236 | −0.3386 | 0.194* | |
H15C | 0.0938 | 0.0569 | −0.3254 | 0.194* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0591 (4) | 0.0372 (4) | 0.0646 (4) | −0.0040 (3) | 0.0382 (3) | 0.0005 (3) |
P1 | 0.0512 (4) | 0.0440 (4) | 0.0452 (3) | −0.0112 (3) | 0.0226 (3) | −0.0035 (3) |
N2 | 0.0461 (11) | 0.0395 (11) | 0.0582 (12) | −0.0059 (9) | 0.0282 (10) | −0.0038 (9) |
C5 | 0.0426 (13) | 0.0393 (13) | 0.0389 (12) | −0.0061 (10) | 0.0180 (11) | −0.0032 (9) |
C4 | 0.0451 (13) | 0.0396 (14) | 0.0455 (13) | −0.0073 (10) | 0.0219 (11) | −0.0049 (10) |
C6 | 0.0455 (13) | 0.0416 (14) | 0.0425 (12) | −0.0052 (11) | 0.0221 (11) | −0.0035 (10) |
C7 | 0.0572 (15) | 0.0428 (14) | 0.0582 (15) | −0.0044 (12) | 0.0313 (13) | −0.0054 (11) |
C1 | 0.0490 (14) | 0.0532 (16) | 0.0514 (14) | −0.0053 (12) | 0.0278 (12) | −0.0090 (11) |
C3 | 0.0579 (16) | 0.0412 (15) | 0.0777 (18) | −0.0081 (12) | 0.0398 (15) | −0.0053 (12) |
C2 | 0.0549 (15) | 0.0535 (17) | 0.0678 (16) | −0.0135 (12) | 0.0374 (14) | −0.0064 (12) |
N1 | 0.0529 (12) | 0.0390 (11) | 0.0741 (14) | −0.0097 (9) | 0.0396 (11) | −0.0039 (10) |
C8 | 0.0488 (14) | 0.0367 (13) | 0.0547 (14) | −0.0089 (11) | 0.0306 (12) | −0.0056 (10) |
C9 | 0.0538 (14) | 0.0431 (14) | 0.0464 (13) | −0.0045 (11) | 0.0319 (12) | −0.0008 (10) |
C11 | 0.087 (2) | 0.0563 (18) | 0.0570 (16) | 0.0167 (16) | 0.0403 (17) | 0.0113 (14) |
C10 | 0.0756 (18) | 0.0459 (16) | 0.0494 (14) | −0.0029 (13) | 0.0352 (14) | −0.0002 (11) |
C14 | 0.0611 (17) | 0.0487 (16) | 0.0647 (17) | −0.0037 (13) | 0.0247 (15) | −0.0009 (13) |
C12 | 0.0643 (18) | 0.079 (2) | 0.0573 (16) | 0.0179 (16) | 0.0290 (15) | 0.0111 (15) |
C13 | 0.0598 (18) | 0.070 (2) | 0.0721 (19) | −0.0062 (15) | 0.0192 (16) | −0.0051 (15) |
F1 | 0.0756 (12) | 0.1209 (17) | 0.0865 (13) | 0.0313 (11) | 0.0186 (10) | 0.0189 (11) |
O1 | 0.0625 (11) | 0.0652 (12) | 0.0842 (13) | −0.0062 (9) | 0.0488 (11) | −0.0148 (10) |
C17 | 0.0617 (18) | 0.087 (2) | 0.0781 (19) | −0.0073 (15) | 0.0467 (16) | −0.0076 (15) |
O2 | 0.0787 (12) | 0.0477 (10) | 0.0626 (11) | −0.0209 (9) | 0.0412 (10) | −0.0049 (8) |
O4 | 0.0680 (11) | 0.0442 (10) | 0.0622 (10) | −0.0108 (8) | 0.0399 (9) | −0.0105 (8) |
O3 | 0.0579 (11) | 0.0853 (14) | 0.0560 (11) | −0.0091 (10) | 0.0125 (10) | 0.0023 (10) |
C16 | 0.093 (2) | 0.086 (2) | 0.125 (3) | 0.0037 (19) | 0.084 (2) | 0.003 (2) |
C15 | 0.120 (3) | 0.149 (4) | 0.054 (2) | −0.030 (3) | 0.003 (2) | 0.009 (2) |
S1—C6 | 1.742 (2) | C9—C14 | 1.381 (3) |
S1—C5 | 1.760 (2) | C9—C10 | 1.382 (3) |
P1—O2 | 1.4593 (17) | C11—C12 | 1.357 (4) |
P1—O3 | 1.5560 (19) | C11—C10 | 1.372 (4) |
P1—O4 | 1.5653 (18) | C11—H11 | 0.9300 |
P1—C8 | 1.807 (2) | C10—H10 | 0.9300 |
N2—C5 | 1.290 (3) | C14—C13 | 1.386 (4) |
N2—C4 | 1.401 (3) | C14—H14 | 0.9300 |
C5—N1 | 1.355 (3) | C12—C13 | 1.355 (4) |
C4—C3 | 1.373 (3) | C12—F1 | 1.359 (3) |
C4—C6 | 1.404 (3) | C13—H13 | 0.9300 |
C6—C7 | 1.374 (3) | O1—C17 | 1.427 (3) |
C7—C1 | 1.384 (3) | C17—H17A | 0.9600 |
C7—H7 | 0.9300 | C17—H17B | 0.9600 |
C1—O1 | 1.368 (3) | C17—H17C | 0.9600 |
C1—C2 | 1.379 (3) | O4—C16 | 1.439 (3) |
C3—C2 | 1.388 (3) | O3—C15 | 1.438 (4) |
C3—H3 | 0.9300 | C16—H16A | 0.9600 |
C2—H2 | 0.9300 | C16—H16B | 0.9600 |
N1—C8 | 1.449 (3) | C16—H16C | 0.9600 |
N1—H1 | 0.8600 | C15—H15A | 0.9600 |
C8—C9 | 1.513 (3) | C15—H15B | 0.9600 |
C8—H8 | 0.9800 | C15—H15C | 0.9600 |
C6—S1—C5 | 88.47 (10) | C14—C9—C8 | 121.5 (2) |
O2—P1—O3 | 116.07 (11) | C10—C9—C8 | 120.1 (2) |
O2—P1—O4 | 114.04 (10) | C12—C11—C10 | 118.1 (3) |
O3—P1—O4 | 103.65 (10) | C12—C11—H11 | 120.9 |
O2—P1—C8 | 113.48 (10) | C10—C11—H11 | 120.9 |
O3—P1—C8 | 101.64 (11) | C11—C10—C9 | 121.7 (3) |
O4—P1—C8 | 106.64 (10) | C11—C10—H10 | 119.1 |
C5—N2—C4 | 109.72 (19) | C9—C10—H10 | 119.1 |
N2—C5—N1 | 125.0 (2) | C9—C14—C13 | 120.3 (3) |
N2—C5—S1 | 116.95 (17) | C9—C14—H14 | 119.9 |
N1—C5—S1 | 118.01 (17) | C13—C14—H14 | 119.9 |
C3—C4—N2 | 126.0 (2) | C13—C12—C11 | 122.6 (3) |
C3—C4—C6 | 118.4 (2) | C13—C12—F1 | 119.0 (3) |
N2—C4—C6 | 115.62 (19) | C11—C12—F1 | 118.4 (3) |
C7—C6—C4 | 121.8 (2) | C12—C13—C14 | 119.0 (3) |
C7—C6—S1 | 128.96 (18) | C12—C13—H13 | 120.5 |
C4—C6—S1 | 109.24 (16) | C14—C13—H13 | 120.5 |
C6—C7—C1 | 118.8 (2) | C1—O1—C17 | 118.1 (2) |
C6—C7—H7 | 120.6 | O1—C17—H17A | 109.5 |
C1—C7—H7 | 120.6 | O1—C17—H17B | 109.5 |
O1—C1—C2 | 124.3 (2) | H17A—C17—H17B | 109.5 |
O1—C1—C7 | 115.5 (2) | O1—C17—H17C | 109.5 |
C2—C1—C7 | 120.2 (2) | H17A—C17—H17C | 109.5 |
C4—C3—C2 | 120.3 (2) | H17B—C17—H17C | 109.5 |
C4—C3—H3 | 119.8 | C16—O4—P1 | 123.11 (18) |
C2—C3—H3 | 119.8 | C15—O3—P1 | 121.1 (2) |
C1—C2—C3 | 120.5 (2) | O4—C16—H16A | 109.5 |
C1—C2—H2 | 119.8 | O4—C16—H16B | 109.5 |
C3—C2—H2 | 119.8 | H16A—C16—H16B | 109.5 |
C5—N1—C8 | 121.96 (19) | O4—C16—H16C | 109.5 |
C5—N1—H1 | 119.0 | H16A—C16—H16C | 109.5 |
C8—N1—H1 | 119.0 | H16B—C16—H16C | 109.5 |
N1—C8—C9 | 115.05 (18) | O3—C15—H15A | 109.5 |
N1—C8—P1 | 107.14 (15) | O3—C15—H15B | 109.5 |
C9—C8—P1 | 110.28 (15) | H15A—C15—H15B | 109.5 |
N1—C8—H8 | 108.0 | O3—C15—H15C | 109.5 |
C9—C8—H8 | 108.0 | H15A—C15—H15C | 109.5 |
P1—C8—H8 | 108.0 | H15B—C15—H15C | 109.5 |
C14—C9—C10 | 118.3 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O2i | 0.86 | 1.99 | 2.793 (3) | 156 |
C8—H8···N2 | 0.98 | 2.44 | 2.868 (4) | 106 |
C14—H14···N1 | 0.93 | 2.62 | 2.919 (5) | 100 |
C16—H16C···F1ii | 0.96 | 2.51 | 3.2496 | 133 |
C15—H15B···Cg1iii | 0.96 | 2.99 | 3.608 (4) | 123 |
C16—H16B···Cg3iv | 0.96 | 2.96 | 3.549 (4) | 121 |
C17—H17C···Cg1v | 0.96 | 2.88 | 3.625 (3) | 136 |
Symmetry codes: (i) −x+1/2, −y+1/2, −z; (ii) −x+1, y, −z+1/2; (iii) −x, y, −z−1/2; (iv) −x+1/2, y+1/2, −z−1/2; (v) −x, y, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C17H18FN2O4PS |
Mr | 396.36 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 296 |
a, b, c (Å) | 19.761 (5), 15.781 (4), 14.395 (4) |
β (°) | 122.109 (3) |
V (Å3) | 3802.4 (16) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.29 |
Crystal size (mm) | 0.30 × 0.26 × 0.22 |
Data collection | |
Diffractometer | Bruker APEXII area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.919, 0.939 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9669, 3428, 2477 |
Rint | 0.039 |
(sin θ/λ)max (Å−1) | 0.599 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.115, 1.04 |
No. of reflections | 3428 |
No. of parameters | 238 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.22, −0.26 |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O2i | 0.86 | 1.99 | 2.793 (3) | 155.7 |
C8—H8···N2 | 0.98 | 2.44 | 2.868 (4) | 106.02 |
C14—H14···N1 | 0.93 | 2.62 | 2.919 (5) | 99.59 |
C16—H16C···F1ii | 0.96 | 2.51 | 3.2496 | 133.38 |
C15—H15B···Cg1iii | 0.96 | 2.99 | 3.608 (4) | 123 |
C16—H16B···Cg3iv | 0.96 | 2.96 | 3.549 (4) | 121 |
C17—H17C···Cg1v | 0.96 | 2.88 | 3.625 (3) | 136 |
Symmetry codes: (i) −x+1/2, −y+1/2, −z; (ii) −x+1, y, −z+1/2; (iii) −x, y, −z−1/2; (iv) −x+1/2, y+1/2, −z−1/2; (v) −x, y, −z+1/2. |
Acknowledgements
The authors acknowledge Jiangxi Agricultural University for supporting this work.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
α-Aminophosphonate derivatives, as isosteres of natural aminocarboxylic acids, have attracted much attention in medicinal and pesticide chemistry in recent years due to their wide range of biological activities (Kafarski et al., 2001; De Lombaert et al., 1995; Du et al., 1999). In our previous work, a plenty of α-aminophosphonate derivatives containing fluorine atom and benzothiazole or iaoxazole moieties had been synthesized and some of them showed fungicidal (Yang et al.,2005) and antitumor activities (Song et al., 2005; Jin et al., 2006). And some crystals of α-aminophosphonate derivatives containing dialkyl had been reported in our previous works. However, It is noteworthy that a cystal of α-aminophosphonate containing dimethyl moiety was obtained for the first time. We report herein the crystal structure of the title compound.
As illustrated in Fig. 1, both the benzene ring with its conjunction carbon atom C8 and the benzothiazole ring with its conjunction nitrogen atom N1 are fairly planar, the dihedral angle between the planes of the benzothiazole group (C1–C7/N2/S1) and the benzene ring (C9–C14) is 119.05 °. The P atom exhibits a distorted tetrahedral configuration because the bond angles of O2—P1—O3 = 116.07 (11) ° and O2—P1—O4 = 114.04 (10) ° are significantly larger than that of O3—P1—O4 = 103.65 (10) °. The P1—C8 = 1.807 (2) Å is similar to the corresponding P—C value of 1.809 (3) Å found in diisopropyl [(benzoylamino)(phenyl)methyl] phosphonate (Fang et al., 2009) and a little shorter than normal P—C single bond length of 1.850 Å (Chen et al., 1987). The C5—N1 = 1.355 (3) Å is remarkably shorter than normal C—N 1.471 (3) Å (Alvarez et al., 2005) and close to the C = N = 1.343 (2) Å, similar to the corresponding bond length of 1.358 (3) Å of the 2-(1-piperidinyl)-1,3-benzothiazole (Alvarez et al., 2005). Meanwhile, the S1—C6 and S1—C5 with bond lengths of 1.742 (2) Å and 1.760 (2) Å, respectively, are shorter than the typical C—S of 1.811 (9) Å (Li et al., 2008). These indicate that the N1 atom and benzothiazole ring form a considerable delocalization of the electron density in which the N1 atom is sp2 hybridized. The molecular packing is consolidated through weak inter/intra molecular N—H···O, C—H···N, and C—H···F hydrogen bonding, C—H···π and π-π stacking interactions (Table 2, Fig. 2, Cg1 = ring (S1/N2/C4—C6); Cg3 = ring(C9–C14)). C—H···π interactions of methyl H atoms are established towards the π-systems of neighboring aromatic groups from 4-fluorophenyl and five rings of 6-methoxybenzothiazol-2-ylamino, with centroid-to-centroid distance are 2.99 (2), 2.96 (3) and 2.88 (2) Å, respectively. In the π-π stacking interactions between two close-by phenyl rings of 4-fluorophenyl, tThe centroid-to-centroid distance is 3.773 (4) Å.