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。