In the crystal structure of the title compound, C
16H
13NO
3S, the benzisothiazole group is almost planar (r.m.s. deviation for all non-H atoms excluding the two O atoms bonded to S = 0.009 Å). The dihedral angle between the fused ring and the terminal ring is 13.8 (1)°. In the crystal, molecules are linked through intermolecular C—H

O contacts forming a chain of molecules along
b.
Supporting information
CCDC reference: 731251
Key indicators
- Single-crystal X-ray study
- T = 296 K
- Mean
(C-C) = 0.005 Å
- R factor = 0.051
- wR factor = 0.178
- Data-to-parameter ratio = 19.0
checkCIF/PLATON results
No syntax errors found
Alert level C
Value of measurement temperature given = 296.000
Value of melting point given = 0.000
PLAT230_ALERT_2_C Hirshfeld Test Diff for C10 -- C11 .. 6.51 su
PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ... 5
0 ALERT level A = In general: serious problem
0 ALERT level B = Potentially serious problem
2 ALERT level C = Check and explain
0 ALERT level G = General alerts; check
0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
1 ALERT type 2 Indicator that the structure model may be wrong or deficient
1 ALERT type 3 Indicator that the structure quality may be low
0 ALERT type 4 Improvement, methodology, query or suggestion
0 ALERT type 5 Informative message, check
A mixture of 2,3-dihydro-1,2-benzisothiazol-3-one-1,1-dioxide (1.83 g, 10.0
mmoles), dimethyl formamide (5.0 ml) and cinnamyl chloride (1.67 g, 10.0
mmoles) was stirred for a period of three hours at 90°C. Contents were cooled
to room temperature; poured over crushed ice to get white coloured
precipitates which were filtered, washed and dried. Crystallization of the
white precipitates (in methanol) afforded suitable crystals for X-ray studies
after recrystalization in methanol.
H atoms bound to C were placed in geometric positions (C—H distance = 0.93 to
0.96 Å) using a riding model with Uiso(H) = 1.2 Ueq(C) or
Uiso(H) = 1.5 Ueq(C methyl).
Data collection: APEX2 (Bruker, 2007); cell refinement: SMART (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009) and Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and local programs.
2-[(
E)-3-Phenylprop-2-enyl]-1,2-benzisothiazol-3(2
H)-one
1,1-dioxide
top
Crystal data top
C16H13NO3S | F(000) = 624 |
Mr = 299.33 | Dx = 1.357 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 1453 reflections |
a = 6.9375 (5) Å | θ = 2.8–20.7° |
b = 7.1579 (4) Å | µ = 0.23 mm−1 |
c = 29.673 (2) Å | T = 296 K |
β = 96.160 (4)° | Needles, white |
V = 1464.99 (17) Å3 | 0.39 × 0.11 × 0.10 mm |
Z = 4 | |
Data collection top
Bruker APEXII CCD area-detector diffractometer | 1722 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.034 |
Graphite monochromator | θmax = 28.3°, θmin = 1.4° |
ϕ and ω scans | h = −9→8 |
8250 measured reflections | k = −8→9 |
3606 independent reflections | l = −35→39 |
Refinement top
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)] = 0.051 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.178 | H-atom parameters constrained |
S = 0.96 | w = 1/[σ2(Fo2) + (0.0875P)2] where P = (Fo2 + 2Fc2)/3 |
3606 reflections | (Δ/σ)max < 0.001 |
190 parameters | Δρmax = 0.32 e Å−3 |
0 restraints | Δρmin = −0.40 e Å−3 |
Crystal data top
C16H13NO3S | V = 1464.99 (17) Å3 |
Mr = 299.33 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 6.9375 (5) Å | µ = 0.23 mm−1 |
b = 7.1579 (4) Å | T = 296 K |
c = 29.673 (2) Å | 0.39 × 0.11 × 0.10 mm |
β = 96.160 (4)° | |
Data collection top
Bruker APEXII CCD area-detector diffractometer | 1722 reflections with I > 2σ(I) |
8250 measured reflections | Rint = 0.034 |
3606 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.051 | 0 restraints |
wR(F2) = 0.178 | H-atom parameters constrained |
S = 0.96 | Δρmax = 0.32 e Å−3 |
3606 reflections | Δρmin = −0.40 e Å−3 |
190 parameters | |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
S1 | 0.25184 (11) | −0.21860 (10) | 0.08353 (3) | 0.0673 (3) | |
O1 | 0.2457 (3) | 0.2827 (3) | 0.05026 (8) | 0.0871 (7) | |
O2 | 0.4314 (3) | −0.2892 (3) | 0.10446 (8) | 0.0937 (8) | |
O3 | 0.0787 (3) | −0.2970 (3) | 0.09666 (7) | 0.0909 (7) | |
N1 | 0.2464 (3) | 0.0118 (3) | 0.09024 (7) | 0.0634 (6) | |
C1 | 0.2500 (4) | −0.1992 (4) | 0.02512 (9) | 0.0552 (7) | |
C2 | 0.2505 (4) | −0.3412 (4) | −0.00625 (12) | 0.0800 (9) | |
H2 | 0.2512 | −0.4661 | 0.0025 | 0.096* | |
C3 | 0.2499 (5) | −0.2902 (6) | −0.05133 (12) | 0.0914 (11) | |
H3 | 0.2495 | −0.3827 | −0.0733 | 0.110* | |
C4 | 0.2498 (4) | −0.1074 (6) | −0.06412 (11) | 0.0805 (9) | |
H4 | 0.2496 | −0.0775 | −0.0946 | 0.097* | |
C5 | 0.2501 (4) | 0.0333 (5) | −0.03269 (10) | 0.0654 (8) | |
H5 | 0.2500 | 0.1578 | −0.0416 | 0.078* | |
C6 | 0.2506 (3) | −0.0140 (4) | 0.01241 (8) | 0.0532 (6) | |
C7 | 0.2488 (4) | 0.1141 (4) | 0.05129 (10) | 0.0609 (7) | |
C8 | 0.2380 (4) | 0.0994 (5) | 0.13459 (10) | 0.0799 (9) | |
H8A | 0.1591 | 0.0230 | 0.1524 | 0.096* | |
H8B | 0.1762 | 0.2206 | 0.1304 | 0.096* | |
C9 | 0.4368 (4) | 0.1238 (5) | 0.16027 (10) | 0.0735 (8) | |
H9 | 0.4949 | 0.0193 | 0.1746 | 0.088* | |
C10 | 0.5312 (5) | 0.2786 (4) | 0.16377 (9) | 0.0700 (8) | |
H10 | 0.4704 | 0.3826 | 0.1499 | 0.084* | |
C11 | 0.7266 (4) | 0.3074 (4) | 0.18770 (9) | 0.0603 (7) | |
C12 | 0.8373 (5) | 0.4574 (4) | 0.17645 (9) | 0.0768 (9) | |
H12 | 0.7871 | 0.5416 | 0.1544 | 0.092* | |
C13 | 1.0228 (5) | 0.4829 (5) | 0.19796 (11) | 0.0834 (10) | |
H13 | 1.0982 | 0.5821 | 0.1897 | 0.100* | |
C14 | 1.0949 (5) | 0.3626 (5) | 0.23127 (12) | 0.0838 (10) | |
H14 | 1.2193 | 0.3801 | 0.2457 | 0.101* | |
C15 | 0.9854 (5) | 0.2174 (5) | 0.24335 (11) | 0.0799 (9) | |
H15 | 1.0337 | 0.1375 | 0.2666 | 0.096* | |
C16 | 0.8052 (5) | 0.1884 (4) | 0.22158 (10) | 0.0745 (9) | |
H16 | 0.7332 | 0.0865 | 0.2296 | 0.089* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
S1 | 0.0771 (6) | 0.0647 (5) | 0.0584 (5) | 0.0005 (4) | −0.0004 (4) | 0.0158 (4) |
O1 | 0.1019 (17) | 0.0544 (13) | 0.1044 (19) | 0.0035 (11) | 0.0083 (13) | 0.0060 (11) |
O2 | 0.1041 (17) | 0.0869 (15) | 0.0828 (16) | 0.0187 (12) | −0.0234 (13) | 0.0209 (12) |
O3 | 0.1006 (17) | 0.0970 (17) | 0.0785 (16) | −0.0211 (12) | 0.0253 (13) | 0.0253 (12) |
N1 | 0.0710 (15) | 0.0670 (15) | 0.0509 (14) | 0.0007 (11) | 0.0009 (11) | 0.0008 (11) |
C1 | 0.0510 (15) | 0.0568 (16) | 0.0570 (16) | −0.0012 (11) | 0.0015 (13) | 0.0099 (13) |
C2 | 0.098 (2) | 0.0619 (19) | 0.080 (2) | −0.0007 (16) | 0.0071 (19) | −0.0011 (17) |
C3 | 0.104 (3) | 0.107 (3) | 0.064 (2) | 0.004 (2) | 0.013 (2) | −0.014 (2) |
C4 | 0.067 (2) | 0.113 (3) | 0.062 (2) | 0.0019 (18) | 0.0115 (16) | 0.012 (2) |
C5 | 0.0494 (16) | 0.081 (2) | 0.0669 (19) | 0.0027 (14) | 0.0093 (14) | 0.0217 (17) |
C6 | 0.0398 (14) | 0.0625 (17) | 0.0572 (16) | 0.0007 (11) | 0.0043 (12) | 0.0131 (13) |
C7 | 0.0500 (16) | 0.0592 (19) | 0.073 (2) | 0.0009 (12) | 0.0023 (14) | 0.0112 (15) |
C8 | 0.072 (2) | 0.100 (2) | 0.068 (2) | −0.0014 (17) | 0.0060 (16) | −0.0131 (17) |
C9 | 0.082 (2) | 0.079 (2) | 0.0603 (19) | 0.0036 (17) | 0.0112 (16) | 0.0005 (15) |
C10 | 0.084 (2) | 0.074 (2) | 0.0532 (18) | 0.0113 (17) | 0.0096 (16) | 0.0003 (14) |
C11 | 0.0657 (18) | 0.0722 (19) | 0.0438 (15) | 0.0036 (14) | 0.0103 (14) | −0.0014 (13) |
C12 | 0.106 (3) | 0.076 (2) | 0.0497 (17) | −0.0063 (18) | 0.0141 (17) | 0.0012 (15) |
C13 | 0.100 (3) | 0.089 (2) | 0.065 (2) | −0.0285 (19) | 0.0236 (19) | −0.0086 (18) |
C14 | 0.067 (2) | 0.115 (3) | 0.069 (2) | −0.0069 (19) | 0.0076 (17) | −0.012 (2) |
C15 | 0.073 (2) | 0.095 (2) | 0.070 (2) | 0.0056 (18) | 0.0020 (18) | 0.0096 (18) |
C16 | 0.073 (2) | 0.078 (2) | 0.072 (2) | −0.0025 (15) | 0.0068 (17) | 0.0110 (16) |
Geometric parameters (Å, º) top
S1—O3 | 1.418 (2) | C8—C9 | 1.512 (4) |
S1—O2 | 1.424 (2) | C8—H8A | 0.9700 |
S1—N1 | 1.662 (2) | C8—H8B | 0.9700 |
S1—C1 | 1.738 (3) | C9—C10 | 1.286 (4) |
O1—C7 | 1.207 (3) | C9—H9 | 0.9300 |
N1—C7 | 1.370 (3) | C10—C11 | 1.476 (4) |
N1—C8 | 1.464 (3) | C10—H10 | 0.9300 |
C1—C6 | 1.378 (3) | C11—C12 | 1.382 (4) |
C1—C2 | 1.378 (4) | C11—C16 | 1.384 (4) |
C2—C3 | 1.387 (4) | C12—C13 | 1.386 (4) |
C2—H2 | 0.9300 | C12—H12 | 0.9300 |
C3—C4 | 1.362 (5) | C13—C14 | 1.365 (4) |
C3—H3 | 0.9300 | C13—H13 | 0.9300 |
C4—C5 | 1.372 (4) | C14—C15 | 1.358 (4) |
C4—H4 | 0.9300 | C14—H14 | 0.9300 |
C5—C6 | 1.380 (3) | C15—C16 | 1.360 (4) |
C5—H5 | 0.9300 | C15—H15 | 0.9300 |
C6—C7 | 1.475 (4) | C16—H16 | 0.9300 |
| | | |
O3—S1—O2 | 117.84 (14) | N1—C8—C9 | 112.4 (2) |
O3—S1—N1 | 109.21 (13) | N1—C8—H8A | 109.1 |
O2—S1—N1 | 109.29 (12) | C9—C8—H8A | 109.1 |
O3—S1—C1 | 112.95 (13) | N1—C8—H8B | 109.1 |
O2—S1—C1 | 112.08 (14) | C9—C8—H8B | 109.1 |
N1—S1—C1 | 92.43 (12) | H8A—C8—H8B | 107.9 |
C7—N1—C8 | 122.3 (3) | C10—C9—C8 | 124.7 (3) |
C7—N1—S1 | 115.28 (19) | C10—C9—H9 | 117.7 |
C8—N1—S1 | 122.4 (2) | C8—C9—H9 | 117.7 |
C6—C1—C2 | 121.6 (3) | C9—C10—C11 | 126.3 (3) |
C6—C1—S1 | 110.5 (2) | C9—C10—H10 | 116.8 |
C2—C1—S1 | 127.9 (2) | C11—C10—H10 | 116.8 |
C1—C2—C3 | 117.2 (3) | C12—C11—C16 | 117.9 (3) |
C1—C2—H2 | 121.4 | C12—C11—C10 | 119.8 (3) |
C3—C2—H2 | 121.4 | C16—C11—C10 | 122.3 (3) |
C4—C3—C2 | 121.5 (3) | C11—C12—C13 | 120.3 (3) |
C4—C3—H3 | 119.3 | C11—C12—H12 | 119.9 |
C2—C3—H3 | 119.3 | C13—C12—H12 | 119.9 |
C3—C4—C5 | 121.0 (3) | C14—C13—C12 | 120.0 (3) |
C3—C4—H4 | 119.5 | C14—C13—H13 | 120.0 |
C5—C4—H4 | 119.5 | C12—C13—H13 | 120.0 |
C4—C5—C6 | 118.6 (3) | C15—C14—C13 | 120.1 (3) |
C4—C5—H5 | 120.7 | C15—C14—H14 | 119.9 |
C6—C5—H5 | 120.7 | C13—C14—H14 | 119.9 |
C1—C6—C5 | 120.1 (3) | C14—C15—C16 | 120.2 (3) |
C1—C6—C7 | 112.6 (2) | C14—C15—H15 | 119.9 |
C5—C6—C7 | 127.3 (3) | C16—C15—H15 | 119.9 |
O1—C7—N1 | 123.6 (3) | C15—C16—C11 | 121.5 (3) |
O1—C7—C6 | 127.1 (3) | C15—C16—H16 | 119.3 |
N1—C7—C6 | 109.2 (2) | C11—C16—H16 | 119.3 |
| | | |
O3—S1—N1—C7 | −117.2 (2) | C8—N1—C7—O1 | 0.6 (4) |
O2—S1—N1—C7 | 112.6 (2) | S1—N1—C7—O1 | −179.9 (2) |
C1—S1—N1—C7 | −1.9 (2) | C8—N1—C7—C6 | −178.0 (2) |
O3—S1—N1—C8 | 62.3 (2) | S1—N1—C7—C6 | 1.5 (3) |
O2—S1—N1—C8 | −67.9 (2) | C1—C6—C7—O1 | −178.7 (3) |
C1—S1—N1—C8 | 177.7 (2) | C5—C6—C7—O1 | 0.4 (4) |
O3—S1—C1—C6 | 113.7 (2) | C1—C6—C7—N1 | −0.2 (3) |
O2—S1—C1—C6 | −110.3 (2) | C5—C6—C7—N1 | 178.9 (2) |
N1—S1—C1—C6 | 1.6 (2) | C7—N1—C8—C9 | −94.9 (3) |
O3—S1—C1—C2 | −67.1 (3) | S1—N1—C8—C9 | 85.6 (3) |
O2—S1—C1—C2 | 68.9 (3) | N1—C8—C9—C10 | 101.9 (4) |
N1—S1—C1—C2 | −179.2 (3) | C8—C9—C10—C11 | −178.7 (3) |
C6—C1—C2—C3 | −0.5 (4) | C9—C10—C11—C12 | 157.8 (3) |
S1—C1—C2—C3 | −179.6 (2) | C9—C10—C11—C16 | −22.3 (5) |
C1—C2—C3—C4 | 0.3 (5) | C16—C11—C12—C13 | 1.6 (4) |
C2—C3—C4—C5 | −0.1 (5) | C10—C11—C12—C13 | −178.4 (3) |
C3—C4—C5—C6 | 0.0 (4) | C11—C12—C13—C14 | −1.8 (5) |
C2—C1—C6—C5 | 0.5 (4) | C12—C13—C14—C15 | 0.1 (5) |
S1—C1—C6—C5 | 179.73 (19) | C13—C14—C15—C16 | 1.6 (5) |
C2—C1—C6—C7 | 179.7 (2) | C14—C15—C16—C11 | −1.8 (5) |
S1—C1—C6—C7 | −1.1 (3) | C12—C11—C16—C15 | 0.1 (4) |
C4—C5—C6—C1 | −0.2 (4) | C10—C11—C16—C15 | −179.8 (3) |
C4—C5—C6—C7 | −179.3 (2) | | |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···O1i | 0.93 | 2.29 | 3.174 (4) | 158 |
Symmetry code: (i) x, y−1, z. |
Experimental details
Crystal data |
Chemical formula | C16H13NO3S |
Mr | 299.33 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 296 |
a, b, c (Å) | 6.9375 (5), 7.1579 (4), 29.673 (2) |
β (°) | 96.160 (4) |
V (Å3) | 1464.99 (17) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.23 |
Crystal size (mm) | 0.39 × 0.11 × 0.10 |
|
Data collection |
Diffractometer | Bruker APEXII CCD area-detector diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8250, 3606, 1722 |
Rint | 0.034 |
(sin θ/λ)max (Å−1) | 0.667 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.178, 0.96 |
No. of reflections | 3606 |
No. of parameters | 190 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.32, −0.40 |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···O1i | 0.9300 | 2.2900 | 3.174 (4) | 158.00 |
Symmetry code: (i) x, y−1, z. |
Benzisothiazolone-1,1-dioxide and its various derivatives are well known as biologically active compounds e.g., saccharin has been identified as an important molecular component in various classes of 5-HTla antagonists, analgesics and human mast cell tryptase inhibitors (Liang et al., 2006). Few of its derivatives are considered to be the most potent orally active human leucocyte elastase (HLE) inhibitors for the treatment ofchronic obstructive pulmonary disease (COPD), acute respiratory distress syndrome (ARDS), cystic fibrosis, asthma and other inflammatory diseases (Kapui et al., 2003). Its N-alkyl derivatives have been successfully transformed to non-steroidal anti-inflammatory drugs e.g., piroxicam (Zia-ur-Rehman et al., 2006).
In continuation to our research on the synthesis of 1,2-benzothiazine 1,1-dioxide derivatives (Zia-ur-Rehman et al., 2009; Zia-ur-Rehman et al., 2006), we have in addtion, worked on the synthesis of benzisothiazole derivatives (Siddiqui et al., 2006; Siddiqui et al., 2008). Herein, crystal structure of the title compound (I) is described. The benzisothiazole moiety is exactly planar.The molecular dimensions are in accord with the corresponding dimensions reported in similar structures (Siddiqui et al., 2007a-c). Each molecule is linked to its adjacent one through C—H···O contacts forming a chain of molecules along b.