摘要:
PROBLEM TO BE SOLVED: To provide a compound useful as a synthetic intermediate of 2-acylamino-4-phenylthiazole derivatives. SOLUTION: There are provided compounds represented by general formula (IIb), 1-4C aliphatic esters thereof, or benzyl esters thereof whose phenyl is unsubstituted or substituted with a methoxy, wherein R' 3 is a group of formula (α) or the like. COPYRIGHT: (C)2011,JPO&INPIT