Synthesis of Enantiopure β- and γ-Amino Alcohols from Homochiral α- and β-Aminoacylsilanes as Stable Synthetic Equivalents of α- and β-Amino Aldehydes
作者:Bianca Flavia Bonini、Mauro Comes-Franchini、Mariafrancesca Fochi、Jacek Gawronski、Germana Mazzanti、Alfredo Ricci、Greta Varchi
DOI:10.1002/(sici)1099-0690(199902)1999:2<437::aid-ejoc437>3.0.co;2-v
日期:1999.2
values equal to or higher than 98% were obtained in the TiCl4-promoted allylation of the N-Pht-aminoacylsilanes 1 and 13 and of the N-Ts-aminoacylsilane 5 with allyltrimethylsilane. Lower de values were obtained in the Sc(OTf)3-catalyzed allylation of 5 with tetraallyltin and in the additions of both allyltrimethylsilane and tetraallyltin to the N-Ts-β-aminoacylsilane 16. Protiodesilylation of the adducts
描述了合成具有两个立体中心的对映纯 β- 和 γ-氨基醇的实用路线,从同手性 α-(1 和 5)和 β-(13 和 16)-氨基酰基硅烷开始,并涉及烯丙基金属化合物的立体选择性加成和随后的加合物的立体特异性蛋白脱甲硅烷化。在亲核加成步骤中实现的非对映选择性程度取决于氮保护基团和所用的试剂。在 TiCl4 促进的 N-Pht-氨基酰基硅烷 1 和 13 以及 N-Ts-氨基酰基硅烷 5 与烯丙基三甲基硅烷的烯丙基化中获得了等于或高于 98% 的非对映体过量 (de) 值。