Stereoselective synthesis of 26-disubstituted piperidine alkaloids via TiCl4 induced iminium ion cyclization of α-cyanoamines
作者:Teng-Kuei Yang、Tsung-Fan Teng、Jyh-Hwa Lin、Yen-Yuan Lay
DOI:10.1016/s0040-4039(00)73244-8
日期:1994.5
The stereoselective cyclization of an α-cyanoamine containing a vinyl group induced by TiCl4 in a methylene chloride solution, produces cis 2,6-dialkylpiperidine; whereas a similar reaction of an α-cyanoamine containing a silyl substituted vinyl group gave the corresponding trans isomer only.
在二氯甲烷溶液中,由TiCl 4诱导的含乙烯基的α-氰胺的立体选择性环化,生成顺式2,6-二烷基哌啶;而含有甲硅烷基取代的乙烯基的α-氰胺的类似反应仅得到相应的反式异构体。