Optically active 1-(fluoro-, trifluoromethyl-or trifluoromethoxy-substituted phenyl) alkylamine n-monoalkyl derivatives and process for producing same
申请人:——
公开号:US20040235961A1
公开(公告)日:2004-11-25
An optically active 1-(fluoro-, trifluoromethyl- or trifluoromethoxy-substituted phenyl)alkylamine N-monoalkyl derivative represented by the formula 4 is produced by a process including (a) reacting an optically active secondary amine, represented by the formula 1, with an alkylation agent R
2
—X, in the presence of a base, thereby converting the secondary amine into an optically active tertiary amine represented by the formula 3; and (b) subjecting the tertiary amine to a hydrogenolysis, thereby producing the N-monoalkyl derivative,
1
wherein R represents a fluorine atom, trifluoromethyl group or trifluoromethoxy group, n represents an integer of from 1 to 5, each of R
1
and R
2
independently represents an alkyl group having a carbon atom number of from 1 to 6, Me represents a methyl group, Ar represents a phenyl group or 1- or 2-naphthyl group, * represents a chiral carbon, and X represents a leaving group.
以式 4 为代表的光学活性 1-(氟、三氟甲基或三氟甲氧基取代苯基)烷基胺 N-单 烷基衍生物的制备方法包括 (a) 式 1 所代表的光学活性仲胺与烷基化剂 R
2
-X,在碱存在下反应,从而将仲胺转化为由式 3 表示的光学活性叔胺;以及 (b) 将叔胺进行氢解,从而生成 N-单烷基衍生物、
1
其中 R 代表氟原子、三氟甲基或三氟甲氧基,n 代表 1 至 5 的整数,每个 R
1
和 R
2
分别代表碳原子数为 1 至 6 的烷基,Me 代表甲基,Ar 代表苯基或 1 或 2-萘基,* 代表手性碳,X 代表离去基团。