Indolyl-oxazaphosphorine Precursors for Stereoselective Synthesis of Phosphite Triesters and Dithymidinyl Phosphorothioates
作者:Jian-Chao Wang、George Just
DOI:10.1021/jo990242l
日期:1999.10.1
7 were synthesized, and their potential as precursors to chiral phosphorothioates was evaluated. Reaction of 7 with a thymidine derivative gave phosphite triester 8 with a large degree of stereoselectivity. Sulfurization with Beaucage's reagent provided phosphorothioate triesters 9. The chiral auxiliary 9b containing a cyano group could be easily removed with aqueous ammonia to form dithymidinyl phosphorothioate
合成了几种新颖的手性吲哚基-氧杂氮杂膦7,并评估了它们作为手性硫代磷酸酯的前体的潜力。7与胸腺嘧啶衍生物的反应产生了具有高度立体选择性的亚磷酸三酯8。用Beaucage试剂进行硫化可提供硫代磷酸酯三酯9。含有氰基的手性助剂9b可以很容易地用氨水除去,形成过量97%非对映异构体的硫代二嘧啶基硫代磷酸酯。手性吲哚基-氧杂氮杂膦7是用于硫代磷酸酯的立体选择性合成的新型前体。