Process for producing t-butyl esters of bridged-ring polycarboxylic acids

摘要

In a process of the present invention for producing a bridged cyclic polycarboxylic acid t-butyl ester, a bridged cyclic polycarboxylic halide of following Formula (1):(wherein ring Z is a bridged cyclic carbon ring; X is a halogen atom; and m denotes an integer of 2 or more, where ring Z may have a substituent) is allowed to react with t-butyl alcohol or its alkali metal salt to thereby yield an ester of following Formula (2):(wherein tBu is a t-butyl group; and ring Z and m have the same meanings as defined above.) This process can commercially efficiently produce a bridged cyclic polycarboxylic acid t-butyl ester. The compound of Formula (1) can be prepared by allowing a bridged cyclic polycarboxylic acid of following Formula (3):(wherein ring Z is a bridged cyclic carbon ring; and m denotes an integer of 2 or more, where ring Z may have a substituent) to react with a halogenating agent.