| abstract |
(57) [Summary] [Structure] Formula (2): (In the formula, R 1 is C 2 -C 12 alkyl, pyridyl or formula (A) (wherein one of the substituents X 1 and Y 1 is hydrogen, Halogen, cyano or C 1 -C 12 alkylthio, The other is hydrogen) and each of R and R ′ independently of one another is C 1 -C 12 alkyl). And a method for producing the same. [Effect] The above compound is easily cyclized into a pyrrolinone derivative in the presence of a strong base. It is a useful intermediate suitable for. |