| abstract |
The present invention provides a kind of method of the compound for formula (1), and wherein X represents hydrogen atom etc., and Y represents hydrogen atom etc., and methods described includes step 1：The compound of formula (2) is set to be reacted in the presence of a lewis acid with the compound of formula (3) to obtain adduct, wherein R represents hydrogen atom etc.；And step 2：Make the adduct obtained in step 1 with hydrazine reaction to obtain the compound of formula (1). |