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Supporting information
![]() | Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536808034491/zl2149sup1.cif |
![]() | Structure factor file (CIF format) https://doi.org/10.1107/S1600536808034491/zl2149Isup2.hkl |
CCDC reference: 709446
Key indicators
- Single-crystal X-ray study
- T = 193 K
- Mean
(C-C)= 0.003 Å
- R factor = 0.055
- wR factor = 0.209
- Data-to-parameter ratio = 15.1
checkCIF/PLATON results
No syntax errors found No errors found in this datablock
To a solution of tert-butyl 4-methylpyridin-2-ylcarbamate (0.75 g, 3.6 mmol) in dry DMF (11 ml) was added under an argon-atmosphere sodium hydride (0.18 g, 4.5 mmol, 60% oil dispersion) at 273 K in such a manner that the temperature was kept below 278 K. The reaction mixture was kept at 273 K for 20 min followed by the addition of benzyl bromide (0.71 g, 4.1 mmol) at the same temperature. After additional stirring at 273 K for 30 min the mixture was allowed to warm to room temperature within 1 h, after which water and ethyl acetate were added. The organic layer was washed subsequently with HCl (0.1 M), sodium bicarbonate and brine, dried (sodium sulfate) and concentrated in vacuo. The residue was purified by flash-chromatography (silica gel, n-hexane/ethyl acetate 3:1) to yield 0.60 g (56%) of I as a colourless solid (Koch et al. 2008). Recrystallization from hot n-hexane/ethyl acetate afforded colourless crystals.
Hydrogen atoms attached to carbons were placed at calculated positions with C—H = 0.95 Å (aromatic) or 0.98–0.99 Å (sp3 C-atom). All H atoms were refined in the riding-model approximation with isotropic displacement parameters (set at 1.2–1.5 times of the Ueq of the parent atom).
Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell refinement: CAD-4 Software (Enraf–Nonius, 1989); data reduction: CORINC (Dräger & Gattow, 1971); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: PLATON (Spek, 2003).
![]() | Fig. 1. View of compound I. Displacement ellipsoids are drawn at the 50% probability level. H atoms are depicted as circles of arbitrary size. |
C18H22N2O2 | Z = 2 |
Mr = 298.38 | F(000) = 320 |
Triclinic, P1 | Dx = 1.215 Mg m−3 |
Hall symbol: -P 1 | Cu Kα radiation, λ = 1.54178 Å |
a = 5.909 (1) Å | Cell parameters from 25 reflections |
b = 9.7779 (18) Å | θ = 65–70° |
c = 14.199 (7) Å | µ = 0.63 mm−1 |
α = 89.683 (13)° | T = 193 K |
β = 87.968 (14)° | Block, yellow |
γ = 83.963 (15)° | 0.45 × 0.45 × 0.33 mm |
V = 815.3 (5) Å3 |
Enraf–Nonius CAD-4 diffractometer | Rint = 0.090 |
Radiation source: rotating anode | θmax = 69.9°, θmin = 3.1° |
Graphite monochromator | h = −7→7 |
ω/2θ scans | k = −11→11 |
5914 measured reflections | l = −17→17 |
3074 independent reflections | 3 standard reflections every 60 min |
2747 reflections with I > 2σ(I) | intensity decay: 3% |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.055 | H-atom parameters constrained |
wR(F2) = 0.209 | w = 1/[σ2(Fo2) + (0.1082P)2 + 0.2701P] where P = (Fo2 + 2Fc2)/3 |
S = 1.12 | (Δ/σ)max < 0.001 |
3074 reflections | Δρmax = 0.31 e Å−3 |
204 parameters | Δρmin = −0.37 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.034 (4) |
C18H22N2O2 | γ = 83.963 (15)° |
Mr = 298.38 | V = 815.3 (5) Å3 |
Triclinic, P1 | Z = 2 |
a = 5.909 (1) Å | Cu Kα radiation |
b = 9.7779 (18) Å | µ = 0.63 mm−1 |
c = 14.199 (7) Å | T = 193 K |
α = 89.683 (13)° | 0.45 × 0.45 × 0.33 mm |
β = 87.968 (14)° |
Enraf–Nonius CAD-4 diffractometer | Rint = 0.090 |
5914 measured reflections | 3 standard reflections every 60 min |
3074 independent reflections | intensity decay: 3% |
2747 reflections with I > 2σ(I) |
R[F2 > 2σ(F2)] = 0.055 | 0 restraints |
wR(F2) = 0.209 | H-atom parameters constrained |
S = 1.12 | Δρmax = 0.31 e Å−3 |
3074 reflections | Δρmin = −0.37 e Å−3 |
204 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 | ||
N1 | 0.6712 (3) | 0.71560 (15) | 0.31250 (11) | 0.0319 (4) | |
C2 | 0.6184 (3) | 0.78127 (18) | 0.22834 (14) | 0.0333 (5) | |
O3 | 0.7015 (3) | 0.88142 (15) | 0.19760 (11) | 0.0464 (4) | |
O4 | 0.4607 (2) | 0.71849 (14) | 0.18563 (10) | 0.0359 (4) | |
C5 | 0.3936 (3) | 0.7575 (2) | 0.08933 (14) | 0.0347 (5) | |
C6 | 0.6005 (4) | 0.7399 (3) | 0.02209 (16) | 0.0487 (6) | |
H6A | 0.7010 | 0.8107 | 0.0348 | 0.073* | |
H6B | 0.5510 | 0.7488 | −0.0430 | 0.073* | |
H6C | 0.6829 | 0.6487 | 0.0311 | 0.073* | |
C7 | 0.2306 (4) | 0.6529 (3) | 0.06899 (18) | 0.0539 (6) | |
H7A | 0.1826 | 0.6636 | 0.0038 | 0.081* | |
H7B | 0.0970 | 0.6673 | 0.1120 | 0.081* | |
H7C | 0.3068 | 0.5600 | 0.0780 | 0.081* | |
C8 | 0.2739 (4) | 0.9025 (2) | 0.08803 (19) | 0.0518 (6) | |
H8A | 0.3828 | 0.9681 | 0.1016 | 0.078* | |
H8B | 0.1497 | 0.9108 | 0.1359 | 0.078* | |
H8C | 0.2119 | 0.9222 | 0.0257 | 0.078* | |
C9 | 0.8500 (3) | 0.75070 (19) | 0.36948 (13) | 0.0321 (5) | |
N10 | 0.8999 (3) | 0.66158 (17) | 0.43875 (12) | 0.0392 (5) | |
C11 | 1.0670 (4) | 0.6864 (2) | 0.49585 (15) | 0.0422 (5) | |
H11 | 1.1012 | 0.6238 | 0.5460 | 0.051* | |
C12 | 1.1917 (3) | 0.7972 (2) | 0.48605 (15) | 0.0405 (5) | |
H12 | 1.3094 | 0.8102 | 0.5280 | 0.049* | |
C13 | 1.1410 (3) | 0.8897 (2) | 0.41319 (14) | 0.0352 (5) | |
C14 | 0.9660 (3) | 0.86750 (19) | 0.35502 (13) | 0.0337 (5) | |
H14 | 0.9247 | 0.9305 | 0.3059 | 0.040* | |
C15 | 1.2734 (3) | 1.0119 (2) | 0.39721 (16) | 0.0434 (5) | |
H15A | 1.2841 | 1.0599 | 0.4570 | 0.065* | |
H15B | 1.1955 | 1.0747 | 0.3519 | 0.065* | |
H15C | 1.4268 | 0.9805 | 0.3723 | 0.065* | |
C16 | 0.5592 (3) | 0.59215 (19) | 0.33849 (14) | 0.0331 (5) | |
H16A | 0.3957 | 0.6093 | 0.3245 | 0.040* | |
H16B | 0.5700 | 0.5772 | 0.4073 | 0.040* | |
C17 | 0.6591 (3) | 0.46264 (18) | 0.28813 (13) | 0.0306 (4) | |
C18 | 0.5344 (3) | 0.3499 (2) | 0.28782 (15) | 0.0404 (5) | |
H18 | 0.3877 | 0.3563 | 0.3181 | 0.048* | |
C19 | 0.6209 (4) | 0.2281 (2) | 0.24390 (18) | 0.0492 (6) | |
H19 | 0.5331 | 0.1521 | 0.2441 | 0.059* | |
C20 | 0.8339 (4) | 0.2171 (2) | 0.19997 (16) | 0.0463 (6) | |
H20 | 0.8937 | 0.1338 | 0.1700 | 0.056* | |
C21 | 0.9597 (4) | 0.3287 (2) | 0.20003 (16) | 0.0449 (5) | |
H21 | 1.1061 | 0.3220 | 0.1695 | 0.054* | |
C22 | 0.8739 (3) | 0.4502 (2) | 0.24424 (15) | 0.0382 (5) | |
H22 | 0.9629 | 0.5256 | 0.2445 | 0.046* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0366 (8) | 0.0237 (8) | 0.0358 (9) | −0.0040 (6) | −0.0036 (6) | 0.0012 (6) |
C2 | 0.0361 (9) | 0.0232 (9) | 0.0401 (10) | −0.0003 (7) | −0.0008 (7) | −0.0005 (7) |
O3 | 0.0612 (9) | 0.0325 (8) | 0.0488 (9) | −0.0166 (6) | −0.0133 (7) | 0.0106 (7) |
O4 | 0.0377 (7) | 0.0326 (7) | 0.0384 (8) | −0.0070 (5) | −0.0082 (5) | 0.0039 (6) |
C5 | 0.0322 (9) | 0.0366 (11) | 0.0349 (10) | −0.0008 (7) | −0.0054 (7) | 0.0024 (8) |
C6 | 0.0409 (11) | 0.0610 (14) | 0.0431 (12) | −0.0011 (9) | 0.0011 (9) | −0.0060 (10) |
C7 | 0.0515 (12) | 0.0581 (15) | 0.0557 (14) | −0.0194 (11) | −0.0143 (10) | 0.0072 (11) |
C8 | 0.0484 (11) | 0.0431 (13) | 0.0608 (14) | 0.0107 (9) | −0.0046 (10) | 0.0099 (11) |
C9 | 0.0365 (9) | 0.0251 (9) | 0.0336 (10) | 0.0014 (7) | −0.0004 (7) | −0.0021 (7) |
N10 | 0.0486 (9) | 0.0289 (9) | 0.0402 (9) | −0.0023 (7) | −0.0088 (7) | 0.0047 (7) |
C11 | 0.0506 (11) | 0.0353 (11) | 0.0405 (11) | −0.0003 (8) | −0.0120 (9) | 0.0034 (9) |
C12 | 0.0399 (10) | 0.0392 (11) | 0.0419 (11) | −0.0002 (8) | −0.0060 (8) | −0.0039 (9) |
C13 | 0.0336 (9) | 0.0324 (10) | 0.0387 (10) | −0.0003 (7) | 0.0023 (7) | −0.0060 (8) |
C14 | 0.0379 (9) | 0.0290 (9) | 0.0340 (10) | −0.0026 (7) | −0.0004 (7) | −0.0013 (8) |
C15 | 0.0376 (10) | 0.0429 (12) | 0.0509 (12) | −0.0095 (8) | −0.0014 (8) | −0.0022 (10) |
C16 | 0.0338 (9) | 0.0273 (9) | 0.0380 (10) | −0.0042 (7) | 0.0030 (7) | 0.0027 (8) |
C17 | 0.0316 (8) | 0.0256 (9) | 0.0351 (9) | −0.0043 (7) | −0.0032 (7) | 0.0043 (7) |
C18 | 0.0398 (10) | 0.0342 (10) | 0.0486 (12) | −0.0117 (8) | 0.0006 (8) | 0.0005 (9) |
C19 | 0.0628 (13) | 0.0295 (11) | 0.0572 (14) | −0.0143 (9) | −0.0015 (10) | 0.0012 (10) |
C20 | 0.0620 (13) | 0.0291 (10) | 0.0458 (12) | 0.0055 (9) | −0.0047 (10) | −0.0037 (9) |
C21 | 0.0407 (10) | 0.0443 (12) | 0.0478 (12) | 0.0025 (8) | 0.0027 (9) | −0.0048 (10) |
C22 | 0.0359 (9) | 0.0337 (10) | 0.0454 (12) | −0.0068 (7) | 0.0041 (8) | 0.0002 (9) |
N1—C2 | 1.383 (3) | C12—C13 | 1.390 (3) |
N1—C9 | 1.424 (3) | C12—H12 | 0.9500 |
N1—C16 | 1.475 (2) | C13—C14 | 1.381 (3) |
C2—O3 | 1.213 (2) | C13—C15 | 1.507 (3) |
C2—O4 | 1.333 (2) | C14—H14 | 0.9500 |
O4—C5 | 1.474 (2) | C15—H15A | 0.9800 |
C5—C7 | 1.512 (3) | C15—H15B | 0.9800 |
C5—C8 | 1.516 (3) | C15—H15C | 0.9800 |
C5—C6 | 1.520 (3) | C16—C17 | 1.512 (3) |
C6—H6A | 0.9800 | C16—H16A | 0.9900 |
C6—H6B | 0.9800 | C16—H16B | 0.9900 |
C6—H6C | 0.9800 | C17—C22 | 1.388 (3) |
C7—H7A | 0.9800 | C17—C18 | 1.389 (3) |
C7—H7B | 0.9800 | C18—C19 | 1.388 (3) |
C7—H7C | 0.9800 | C18—H18 | 0.9500 |
C8—H8A | 0.9800 | C19—C20 | 1.379 (3) |
C8—H8B | 0.9800 | C19—H19 | 0.9500 |
C8—H8C | 0.9800 | C20—C21 | 1.383 (3) |
C9—N10 | 1.331 (3) | C20—H20 | 0.9500 |
C9—C14 | 1.403 (3) | C21—C22 | 1.386 (3) |
N10—C11 | 1.342 (3) | C21—H21 | 0.9500 |
C11—C12 | 1.377 (3) | C22—H22 | 0.9500 |
C11—H11 | 0.9500 | ||
C2—N1—C9 | 122.86 (15) | C11—C12—H12 | 120.9 |
C2—N1—C16 | 118.75 (16) | C13—C12—H12 | 120.9 |
C9—N1—C16 | 117.88 (15) | C14—C13—C12 | 118.64 (18) |
O3—C2—O4 | 124.64 (19) | C14—C13—C15 | 120.26 (18) |
O3—C2—N1 | 125.50 (18) | C12—C13—C15 | 121.11 (19) |
O4—C2—N1 | 109.86 (15) | C13—C14—C9 | 119.18 (18) |
C2—O4—C5 | 120.92 (14) | C13—C14—H14 | 120.4 |
O4—C5—C7 | 101.60 (15) | C9—C14—H14 | 120.4 |
O4—C5—C8 | 110.50 (17) | C13—C15—H15A | 109.5 |
C7—C5—C8 | 111.09 (18) | C13—C15—H15B | 109.5 |
O4—C5—C6 | 109.95 (15) | H15A—C15—H15B | 109.5 |
C7—C5—C6 | 110.71 (19) | C13—C15—H15C | 109.5 |
C8—C5—C6 | 112.47 (17) | H15A—C15—H15C | 109.5 |
C5—C6—H6A | 109.5 | H15B—C15—H15C | 109.5 |
C5—C6—H6B | 109.5 | N1—C16—C17 | 114.19 (14) |
H6A—C6—H6B | 109.5 | N1—C16—H16A | 108.7 |
C5—C6—H6C | 109.5 | C17—C16—H16A | 108.7 |
H6A—C6—H6C | 109.5 | N1—C16—H16B | 108.7 |
H6B—C6—H6C | 109.5 | C17—C16—H16B | 108.7 |
C5—C7—H7A | 109.5 | H16A—C16—H16B | 107.6 |
C5—C7—H7B | 109.5 | C22—C17—C18 | 118.39 (18) |
H7A—C7—H7B | 109.5 | C22—C17—C16 | 122.65 (16) |
C5—C7—H7C | 109.5 | C18—C17—C16 | 118.94 (16) |
H7A—C7—H7C | 109.5 | C19—C18—C17 | 120.95 (18) |
H7B—C7—H7C | 109.5 | C19—C18—H18 | 119.5 |
C5—C8—H8A | 109.5 | C17—C18—H18 | 119.5 |
C5—C8—H8B | 109.5 | C20—C19—C18 | 120.19 (19) |
H8A—C8—H8B | 109.5 | C20—C19—H19 | 119.9 |
C5—C8—H8C | 109.5 | C18—C19—H19 | 119.9 |
H8A—C8—H8C | 109.5 | C19—C20—C21 | 119.30 (19) |
H8B—C8—H8C | 109.5 | C19—C20—H20 | 120.3 |
N10—C9—C14 | 122.13 (19) | C21—C20—H20 | 120.3 |
N10—C9—N1 | 113.83 (16) | C20—C21—C22 | 120.57 (19) |
C14—C9—N1 | 124.04 (17) | C20—C21—H21 | 119.7 |
C9—N10—C11 | 117.88 (18) | C22—C21—H21 | 119.7 |
N10—C11—C12 | 123.88 (19) | C21—C22—C17 | 120.60 (18) |
N10—C11—H11 | 118.1 | C21—C22—H22 | 119.7 |
C12—C11—H11 | 118.1 | C17—C22—H22 | 119.7 |
C11—C12—C13 | 118.26 (19) | ||
C9—N1—C2—O3 | −6.7 (3) | C11—C12—C13—C15 | −178.86 (18) |
C16—N1—C2—O3 | −178.23 (17) | C12—C13—C14—C9 | −1.9 (3) |
C9—N1—C2—O4 | 173.65 (15) | C15—C13—C14—C9 | 177.99 (16) |
C16—N1—C2—O4 | 2.1 (2) | N10—C9—C14—C13 | 1.4 (3) |
O3—C2—O4—C5 | 7.6 (3) | N1—C9—C14—C13 | −178.34 (15) |
N1—C2—O4—C5 | −172.67 (14) | C2—N1—C16—C17 | 78.3 (2) |
C2—O4—C5—C7 | 175.46 (17) | C9—N1—C16—C17 | −93.7 (2) |
C2—O4—C5—C8 | −66.6 (2) | N1—C16—C17—C22 | 18.4 (3) |
C2—O4—C5—C6 | 58.2 (2) | N1—C16—C17—C18 | −163.51 (17) |
C2—N1—C9—N10 | −169.13 (16) | C22—C17—C18—C19 | −0.7 (3) |
C16—N1—C9—N10 | 2.5 (2) | C16—C17—C18—C19 | −178.88 (19) |
C2—N1—C9—C14 | 10.6 (3) | C17—C18—C19—C20 | 0.3 (4) |
C16—N1—C9—C14 | −177.75 (16) | C18—C19—C20—C21 | −0.1 (4) |
C14—C9—N10—C11 | 0.1 (3) | C19—C20—C21—C22 | 0.4 (3) |
N1—C9—N10—C11 | 179.83 (16) | C20—C21—C22—C17 | −0.9 (3) |
C9—N10—C11—C12 | −1.1 (3) | C18—C17—C22—C21 | 1.0 (3) |
N10—C11—C12—C13 | 0.5 (3) | C16—C17—C22—C21 | 179.10 (19) |
C11—C12—C13—C14 | 1.0 (3) |
Experimental details
Crystal data | |
Chemical formula | C18H22N2O2 |
Mr | 298.38 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 193 |
a, b, c (Å) | 5.909 (1), 9.7779 (18), 14.199 (7) |
α, β, γ (°) | 89.683 (13), 87.968 (14), 83.963 (15) |
V (Å3) | 815.3 (5) |
Z | 2 |
Radiation type | Cu Kα |
µ (mm−1) | 0.63 |
Crystal size (mm) | 0.45 × 0.45 × 0.33 |
Data collection | |
Diffractometer | Enraf–Nonius CAD-4 diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5914, 3074, 2747 |
Rint | 0.090 |
(sin θ/λ)max (Å−1) | 0.609 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.055, 0.209, 1.12 |
No. of reflections | 3074 |
No. of parameters | 204 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.31, −0.37 |
Computer programs: CAD-4 Software (Enraf–Nonius, 1989), CORINC (Dräger & Gattow, 1971), SIR97 (Altomare et al., 1999), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2003).
N-Benzyl-2-aminopyridin-4-yl derivatives can be found in different p38 MAP kinase inhibitors, like the imidazolopyridines (Laufer & Koch 2008; Koch et al. 2008), thiazolopyridines (Miwatashi et al. 2005) or pyrazolopyridines (Stevens et al. 2005) and in histamine H2-receptor antagonists (Lipinski et al. 1985).
The title compound, tert-butyl N-benzyl-N-(4-methylpyridin-2-yl)carbamate (I), was obtaineded as an intermediate in the synthesis of 2-alkylsulfanyl-5-(2-aminopyridin-4-yl)-4-(4-fluorophenyl)imidazoles as potent p38 MAP kinase inhibitors (Laufer & Koch 2008; Koch et al. 2008).
In the crystal structure of the title compound I the pyridine ring makes dihedral angles of 83.71 (6)° and 9.2 (1)° to the phenyl ring and the carbamate plane, respectively. The phenyl ring and the carbamate plane are nearly perpendicular to one another with a dihedral angle of 87.17 (7)°. The N1—C2 bond [1.383 (2) Å] of the carbamte function is shorter than the normal N1—C16-bond [1.475 (2) Å] to the benzyl moiety, indicating the partial double bond character of the amide bond of the carbamate.