Patent ID: 8530506
Filing Date: 2013-09-10
Classification: C07D,Y02P

Abstract:
1. A production method of a biaryltetrazole derivative represented by the formula [I]: wherein X 2 is a halogen atom, and R 1 is a tetrazolyl-protecting group selected from a C 7-19 aralkyl group, a substituted C 7-19 aralkyl group and a trialkylsilyl group, or a salt thereof, which comprises 1) reacting an aryltetrazole derivative represented by the formula [II]: wherein R wherein R 2) in the obtained compound represented by the formula [IV]: wherein the symbols are as defined above, wherein the symbol is as defined above; and 3) halogenating the compound represented by the formula [IV] wherein R the compound represented by the formula [V] when R