N-(3,4-Dichloro-benzyl)-2-(2,2-dimethyl-5-oxo-[1,3]dioxolane-4-ylidene)-N-methoxy-acetamide → 3-[(3,4-Dichlorobenzyl)-methoxy-carbamoyl]-2-hydroxy-acrylic acid methyl ester

HRID 2214547Notes

Reaction equation

HRID 2214547 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH:20]=[CH:21][C:22]=1[Cl:23])[CH2:5][N:6]([O:18][CH3:19])[C:7](=[O:17])[CH:8]=[C:9]1[C:13](=[O:14])[O:12][C:11](C)(C)[O:10]1>CO>[CH3:11][O:12][C:13](=[O:14])[C:9]([OH:10])=[CH:8][C:7](=[O:17])[N:6]([CH2:5][C:4]1[CH:20]=[CH:21][C:22]([Cl:23])=[C:2]([Cl:1])[CH:3]=1)[O:18][CH3:19]

Participants

3

Reactant 1

HCID 85435466N-(3,4-Dichloro-benzyl)-2-(2,2-dimethyl-5-oxo-[1,3]dioxolane-4-ylidene)-N-methoxy-acetamide

Product 1

HCID 723950783-[(3,4-Dichlorobenzyl)-methoxy-carbamoyl]-2-hydroxy-acrylic acid methyl esterYield 95%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

N-(3,4-Dichlorobenzyl)-2-(2,2-dimethyl-5-oxo-[1,3]-dioxolan-4-ylidene)-N-methoxy-acetamide was treated with methanol as described in the preparation of Compound 44-D and gave the title ester as white crystals (95% yield); mp 111° C. 1HNMR 400 MHz (CDCl3) δ (ppm): 3.72 (3H, s, OCH3), 3.90 (3H, s, OCH3), 4.77 (2H, s, NCH2), 6.46 (1H, s, CH), 7.17 (1H, dd, J=2.0 Hz, J=8.0 Hz, aromatic), 7.42 (1H, d, J=8.0 Hz, aromatic), 7.43 (1H, d, J=2.0 Hz, aromatic). Anal. calcd for C13H13Cl2NO5: C, 46.73; H, 3.92; N, 4.19. Found: C, 46.95; H, 3.82; N, 3.97.

Workup

  1. customas described in the preparation of Compound 44-D

Sources & evidence

ORD record
ord-b3e0055491814d99a8718ac365585f2e
Source dataset
uspto-grants-2006_09
Patent number
US07109186B2

Reaction notes

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