Patent ID: 7989621

Claim:
A method for producing a compound represented by formula (4), comprising the steps of: reacting a compound represented by formula (1) with a diazomethane compound followed by being reacted with oxidants and at least one selected from the group consisting of alcohols and glycols in order to obtain a compound represented by formula (2): wherein X represents Cl or Br; R 1 and R 2 are the same or different, and represent lower alkoxy groups, or benzyloxy groups, or R 1 and R 2 are taken together to represent an alkylenedioxy group; and reacting the compound represented by formula (2) with a compound represented by formula (3): wherein R 1 and R 2 are the same as defined above; R 3 represents an indolyl group; Y 1 represents CH 2 CH 2 CH 2 ; and Z 1 represents a guanidino group.