Remarkable effects of titanium tetrachloride in diastereoselective aza Diels–Alder cycloaddition: synthesis of (S)-piperazic acid
作者:Kazuishi Makino、Yoshiaki Henmi、Makiko Terasawa、Osamu Hara、Yasumasa Hamada
DOI:10.1016/j.tetlet.2004.12.003
日期:2005.1
Titanium tetrachloride-mediated aza Diels–Alder cycloaddition using a chiral diene and an aza dienophile proceeds in highly diastereoselective manner to form a dehydropiperazic acid derivative in high yield, and diastereoselectivity of the reaction depends on the quantity of titanium tetrachloride.
使用手性二烯和氮杂亲二烯体的四氯化钛介导的氮杂Diels-Alder环加成反应以非对映高选择性的方式进行,以高收率形成脱氢哌嗪酸衍生物,反应的非对映选择性取决于四氯化钛的量。