Synthesis of C2 symmetric primary vicinal diamines. Double stereospecific mitsunobu reaction on the heterocyclic diols derived from tartaric acid
作者:Jacek Skarżewski、Anil Gupta
DOI:10.1016/s0957-4166(97)00173-0
日期:1997.6
and (R,R)-5 were obtained by cyclization and reduction of both enantiomers of (+)- and (−)-tartaric acid, respectively. Also (S,S)-3,4-dihydroxytetrahydrofurane 6 was prepared from (+)-diethyl tartrate. All these heterocyclic vic-diols underwent twofold Mitsunobu reaction (Ph3P/DEAD/HN3) followed by catalytic hydrogenation forming stereospecifically the corresponding primary vicinal diamines (R,R)-, (S
通过将(+)-和(-)-酒石酸的两个对映异构体分别环化和还原,获得手性的1-烷基-3,4-二羟基吡咯烷(S,S)-和(R,R)-5。同样,由(+)-酒石酸二乙酯制备(S,S)-3,4-二羟基四氢呋喃6。所有这些杂环vic- diols均进行了两次Mitsunobu反应(Ph 3 P / DEAD / HN 3),然后进行催化加氢形成立体定向,形成相应的主要邻位二胺(R,R)-,(S,S)-2和(R,R )-3。二胺2、3的绝对构型是通过其N,N'-二邻苯二甲酰基衍生物的激子耦合CD光谱确定的。