申请人:Onomura Osamu
公开号:US20140012010A1
公开(公告)日:2014-01-09
Provided is a process for producing an optically active compound represented by Formula (3):
(wherein R
1
is an alkyl group, an alkynyl group, an alkenyl group, an aliphatic heterocyclic group, a cycloalkyl group, an aryl group, an aralkyl group, or an aromatic heterocyclic group, and any hydrogen atom of R
1
may be replaced with a substituent; R
2
is a hydrogen atom or a group which is not reactive in the reaction below; and * represents a chiral center) or a salt thereof by subjecting a compound represented by Formula (1):
(wherein R
1
and R
2
have the same meanings as defined in Formula (3)) to a ring closure reaction in the presence of a chiral ligand having 1 or more coordination sites, a Lewis acid represented by Formula (2):
M
m
Z
n
(2)
(wherein M is a metal ion, Z is a counter anion of M, and m and n are integers of 1 to 4), and a sulfonyl halide having an optionally substituted alkyl or phenyl group