PROCESS FOR PREPARING 1-(4-PIPERIDINYL)BENZIMIDAZOLONE DERIVATIVES
申请人:Iwamura Hiroshi
公开号:US20110295013A1
公开(公告)日:2011-12-01
Provision of an industrial method of producing a 1-(4-piperidinyl)benzimidazolone derivative in a high yield at a low cost.
A production method of 1-(4-piperidinyl)benzimidazolone derivative (1) or a salt thereof according to the following steps.
[step 1] a step of subjecting a piperidone compound (2) and an aniline compound (3) to a reductive amination reaction to give to a compound (4)
[step 2] a step of reacting the compound (4) with di-t-alkyl dicarbonate or N,N′-disuccinimidyl carbonate to give the 1-(4-piperidinyl)benzimidazolone derivative (1)
wherein R
1
is optionally substituted alkyl or an optionally substituted cyclic group, and
R
2
is optionally substituted alkyl, optionally substituted alkenyl or optionally substituted aryl.