Acetic Anhydride → HCID 86733634, compound

Reaction equation

[C:1]1([N:7]2[C:11](=[O:12])[CH2:10][S:9][C:8]2=[S:13])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH2:14]([O:16][C:17](OCC)(OCC)[CH2:18][CH3:19])[CH3:15].C(OC(=O)C)(=O)C>>[CH2:14]([O:16][C:17](=[C:10]1[S:9][C:8](=[S:13])[N:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[C:11]1=[O:12])[CH2:18][CH3:19])[CH3:15]

Participants

Reactant 3

HCID 7918Acetic Anhydride

HCID 66995Ethyl orthopropionate

HCID 73822N-Phenylrhodanine

Product 1

HCID 86733634HCID 86733634, compound

Procedure

A mixture of 8.4 g. (0.04 m.) of 3-phenylrhodanine, 21 g. (0.12 m.) of triethylorthopropionate and 80 ml. of acetic anhydride is heated under reflux for six hours, cooled and filtered. The solid is washed with 50% aqueous acetic acid to afford 5-(1'-ethoxypropylidene)-3-phenylrhodanine, m.p. 178°-181°C.