PROCESS FOR PRODUCTION OF TETRASOLE-DERIVATIVES DECREASING THE PATHALOGICALLY HIGH COLESTHERIN-LEVEL OF BLOOD AND INTERMEDIERS APPLICABLE FOR THEIR PRODUCTION

摘要

This invention provides novel tetrazole intermediates of the formula wherein R1 and R4 each are independently hydrogen, halogen, C1-4 alkyl, C1-4 alkoxy or trifluoromethyl; R2,R3,R5 and R6 each are independently hydrogen, halogen, C1-4 alkyl or C1-4 alkoxy; B is hydrogen, C1-4 alkoxycarbonyl, CH2Y or CH2Z; Y is hydrogen, hydroxyl or X; Z is X is bromo, chloro or iodo; R10 is C1-4 alkyl; and R11 is phenyl which is unsubstituted or substituted by one or two C1-4 alkyl or chloro substituents. and processes thereof which are useful for the preparation of antihypercholesterolemic agents.