| abstract |
The present invention relates to a process for producing a compound of the formula (1) (see Formula) wherein X represents a hydrogen atom, etc., and Y represents a hydrogen atom, etc., comprising step 1 reaction of a compound of the formula (2) and a compound of the formula (3) in the presence of a Lewis acid (see Formula) wherein R represents a hydrogen atom, etc., (see Formula) where R represents a hydrogen atom, etc., (see Formula) to obtain an adduct, and step 2 of reaction of the adduct obtained in step 1 and hydrazine to obtain the compound of the formula (1). |