Dimethylformamide → HCID 86605709, compound

HRID 2221536Notes

Reaction equation

[CH2:1]([O:8][C:9]1[C:13](/[CH:14]=[C:15]2/[C:16](=[O:21])[NH:17][C:18](=[O:20])[S:19]/2)=[CH:12][N:11]([C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:28]N(C)C=O.[H-].[Na+].CI>O>[CH2:1]([O:8][C:9]1[C:13](/[CH:14]=[C:15]2/[C:16](=[O:21])[N:17]([CH3:28])[C:18](=[O:20])[S:19]/2)=[CH:12][N:11]([C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[N:10]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a mixture of (5Z)-5-[(3-benzyloxy-1-phenyl-1H-pyrazol-4-yl)methylene]-1,3-thiazolidine-2,4-dione (1.30 g) and N,N-dimethylformamide (5 mL) was added sodium hydride (60% in oil, 0.15 g) at 0° C. After stirring the reaction mixture at 0° C. for 30 min, methyl iodide (0.58 g) was added to the reaction mixture, and the mixture was further stirred at room temperature for 4 hrs. The reaction mixture was poured into water, and the precipitated crystals were collected by filtration to give (5Z)-5-[(3-benzyloxy-1-phenyl-1H-pyrazol-4-yl)methylene]-3-methyl-1,3-thiazolidine-2,4-dione as yellow crystals (1.30 g, yield 98%). Recrystallization from tetrahydrofuran-hexane gave yellow prism crystals. melting point: 226-227° C.

Workup

stirringthe mixture was further stirred at room temperature for 4 hrs
filtrationthe precipitated crystals were collected by filtration

Sources & evidence

ORD record: ord-fe731131360b4d48b9ef500621e3de7b
Source dataset: uspto-grants-2008_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07368578B2

Reaction notes

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