Lithium methanolate → 4-[3E-(2,4-Dimethoxy-5-pyrrolidin-1-yl-phenyl)-acryloyl]-N-pyridin-2-yl-benzenesulfonamide

HRID 347374Notes

Reaction equation

HRID 347374 reaction equation
[C:1]([C:4]1[CH:9]=[CH:8][C:7]([S:10]([NH:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][N:15]=2)(=[O:12])=[O:11])=[CH:6][CH:5]=1)(=[O:3])[CH3:2].[CH3:20][O:21][C:22]1[CH:29]=[C:28]([O:30][CH3:31])[C:27]([N:32]2[CH2:36][CH2:35][CH2:34][CH2:33]2)=[CH:26][C:23]=1[CH:24]=O.C[O-].[Li+]>CN(C=O)C.CO>[CH3:20][O:21][C:22]1[CH:29]=[C:28]([O:30][CH3:31])[C:27]([N:32]2[CH2:36][CH2:35][CH2:34][CH2:33]2)=[CH:26][C:23]=1/[CH:24]=[CH:2]/[C:1]([C:4]1[CH:5]=[CH:6][C:7]([S:10]([NH:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][N:15]=2)(=[O:12])=[O:11])=[CH:8][CH:9]=1)=[O:3]

Participants

6

Reactant 3

HCID 4177230Lithium methanolateHCID 210825102,4-Dimethoxy-5-pyrrolidin-1-ylbenzaldehydeHCID 227503274-Acetyl-N-(2-pyridyl)benzenesulfonamide

Product 1

HCID 117522574-[3E-(2,4-Dimethoxy-5-pyrrolidin-1-yl-phenyl)-acryloyl]-N-pyridin-2-yl-benzenesulfonamideYield 51%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6228DimethylformamideSolvent

Procedure

A solution 4-acetyl-N-pyridin-2-ylbenzenesulfonamide (Ex-5A, 588 mg, 2.13 mmol) and 2,4-dimethoxy-5-pyrrolidin-1-yl-benzaldehyde (Ex-38B, 500 mg, 2.13 mmol) in DMF (9.3 mL) and MeOH (4.0 mL) was treated with lithium methoxide (243 mg, 6.39 mmol) and stirred for 20 h at room temperature under nitrogen. The reaction mixture was quenched with water (25 mL) and extracted ethyl acetate (3×50 mL). The product precipitated out of the organic phase to give 535 mg (51%) of the title compound as a red solid, mp 124–128° C. 1H-NMR (300 MHz, DMSO-d6) 8.16 (d, 2H, J=8.7), 8.02 (d, 1H, J=15.9 Hz), 7.95 (m, 3H), 7.70 (t, 1H, J=7.80 Hz), 7.61 (d, 1H, J=16.2 Hz), 7.18 (d, 1H, J=8.70 Hz), 7.15 (s, 1H), 6.83 (t, 1H, J=6.0 Hz), 6.66 (s, 1H), 3.84 (s, 6H), 3.13 (m, 4H), 1.18 (m, 4H). HRMS (ESI) Calcd. for C26H27N3O5S: 494.1750 [(M+H)+]; Found: 494.1750.

Workup

  1. customThe reaction mixture was quenched with water (25 mL)
  2. extractionextracted ethyl acetate (3×50 mL)
  3. customThe product precipitated out of the organic phase

Sources & evidence

ORD record
ord-68052f673d7542b78c1e7c8174c941a5
Source dataset
uspto-grants-2007_02
Patent number
US07173129B2

Reaction notes

Loading…