Cesium carbonate → cis-4-[[(2-Carbamoyl-cyclohexyl)-(4-chlorobenzenesulfonyl)-amino]-methyl]-benzoic acid methyl ester

HRID 7030

Reaction equation

HRID 7030 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH:11][C@@H:12]2[CH2:17][CH2:16][CH2:15][CH2:14][C@@H:13]2[C:18]([NH2:20])=[O:19])(=[O:10])=[O:9])=[CH:4][CH:3]=1.Br[CH2:22][C:23]1[CH:32]=[CH:31][C:26]([C:27]([O:29][CH3:30])=[O:28])=[CH:25][CH:24]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>C(#N)C>[CH3:30][O:29][C:27](=[O:28])[C:26]1[CH:31]=[CH:32][C:23]([CH2:22][N:11]([C@@H:12]2[CH2:17][CH2:16][CH2:15][CH2:14][C@@H:13]2[C:18](=[O:19])[NH2:20])[S:8]([C:5]2[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=2)(=[O:9])=[O:10])=[CH:24][CH:25]=1

Participants

5

Reactant 3

HCID 10796Cesium carbonateHCID 256687Methyl 4-(bromomethyl)benzoateHCID 69656354(1S,2R)-2-(4-chlorobenzenesulfonylamino)-cyclohexanecarboxylic acid amide

Product 1

HCID 11202122cis-4-[[(2-Carbamoyl-cyclohexyl)-(4-chlorobenzenesulfonyl)-amino]-methyl]-benzoic acid methyl esterYield 22%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of (1S,2R)-2-(4-chlorobenzenesulfonylamino)-cyclohexanecarboxylic acid amide (670 mg, 2.12 mmol), methyl 4-(bromomethyl)benzoate (534 mg, 2.33 mmol), cesium carbonate (1.04 g, 3.18 mmol) and acetonitrile (20 mL) was stirred vigorously at room temperature for 18 h. The crude mixture was filtered through celite and concentrated in vacuo. The product was purified by silica gel column chromatography (methanol/chloroform, 0.25%) to afford 213 mg (22% yield) of 4-[[(1R,2S)-(2-carbamoyl-cyclohexyl)-(4-chlorobenzenesulfonyl)-amino]-methyl]-benzoic acid methyl ester. An analytical sample was obtained after recrystallization from ethyl acetate/hexanes: 1H NMR (400 Mz, DMSO) δ 7.85 (d, 2 H, J=8.3), 7.82 (d, 2 H, J=8.5), 7.63 (d, 2 H, J=8.5), 7.42 (d, 2 H, J=8.3), 7.28 (br s, 1 H), 6.60 (br, s, 1 H), 4.64 (ABq, 2 H, Δv=69.4, Jab=17.4), 3.88 (m, 1 H), 3.85 (s, 3 H), 2.79 (m, 1 H), 2.42 (m, 1 H), 1.78 (m, 1 H), 1.64 (m, 2 H), 1.38–1.21 (m, 3 H), 0.90 (m, 1 H); MS m/e 465.1 (M+H)+.

Workup

  1. filtrationThe crude mixture was filtered through celite and
  2. concentrationconcentrated in vacuo
  3. customThe product was purified by silica gel column chromatography (methanol/chloroform, 0.25%)

Sources & evidence

ORD record
ord-961c80649e854235a82775b81e37070b
Source dataset
uspto-grants-2006_08
Patent number
US07084178B2

Linked notes

Loading…