METHOD FOR PRODUCING ASYMMETRIC TETRASUBSTITUTED CARBON ATOM-CONTAINING COMPOUND
申请人:Tani Yuichiro
公开号:US20090054648A1
公开(公告)日:2009-02-26
The invention provides an industrial method for producing a spiroaminopyrrolidone derivative, which is an intermediate for producing a quinolone antibacterial agent.
The invention provides a method for producing a compound represented by formula (2):
(wherein n is an integer of 2 to 5; R
1
represents a (substituted) alkyl group or a (substituted) aryl group; and R
2
represents a (substituted) alkoxycarbonyl group, a (substituted) aralkyloxycarbonyl group, a (substituted) aliphatic acyl group, or a (substituted) aromatic acyl group), which includes treating a compound represented by formula (1):
(wherein n, R
1
, and R
2
are the same as defined above; and R
3
represents a hydrogen atom, a (substituted) alkyl group, or a (substituted) aralkyl group) under a hydrogen gas atmosphere in the presence of a metallic catalyst.