| abstract |
An industrially excellent alternative process for producing cyclodepsipeptide derivatives, as represented in formula (1), having an excellent vermicidal activity as an animal and human an thelmintic, wherein R1 represents hydrogen or a hydroxyl-protective group; R2 represents a carboxyl group optionally protected; R3 , R4 , R7 and R a represent each a lower alkyl, aryl or (un) substituted aralkyl; and R5, R6, R9 and R10 represent each a lower alkyl. |