The Tri-n-butyltin Group as a Novel Stereocontrol Element and Synthetic Handle in the Aza-[2,3]-Wittig Sigmatropic Rearrangement
作者:James C Anderson、Craig A Roberts
DOI:10.1016/s0040-4039(97)10477-4
日期:1998.1
a non terminal alkynyl benzyl amine is described which furnished a tri-nbutyltin substituted aza-[2,3]-Wittig sigmatropic rearrangement precursor. Anionic rearrangement afforded a vinyl stannane product, in 71% yield, with near complete control of diastereoselectivity. Subsequent transition metal catalysed carbon-carbon bond forming reactions gave potential precursors to novel unnatural amino acids
立体选择性反式的非终端炔基苄基胺的hydrostannation描述其中布置一个三Ñ丁基锡取代的氮杂- [2,3] -Wittigσ重排前体。阴离子重排提供了乙烯基锡烷产物,产率为71%,几乎完全控制了非对映选择性。随后的过渡金属催化的碳-碳键形成反应以良好至中等的产率为新的非天然氨基酸提供了潜在的前体。©1997 Elsevier ScienceLtd。保留所有权利。