作者:Adolph C. Bohnstedt、J.V.N.Vara Prasad、Daniel H. Rich
DOI:10.1016/s0040-4039(00)73956-6
日期:1993.8
The synthesis of MeLeu and MeLeu-D-Leu alkene dipeptide isosteres are described. Isosteres with an E-alkene bond were synthesized stereoselectively by employing the [2, 3] Wittig rearrangement to control double bond geometry and C-2 configuration. Z-alkene isosters were obtained as an easily separable mixture of diastereomers via alkylation of a Z-alkene MeLeu-Gly isostere that was obtained using a
描述了MeLeu和MeLeu-D-Leu烯烃二肽等排体的合成。通过使用[2,3] Wittig重排控制双键的几何形状和C-2构型,立体选择性地合成具有E-烯键的等排体。ž -烯烃电子等排得到为非对映体易于分离的混合物通过的烷基化ž指使用得到-烯烃MeLeu -甘氨酸等排Ž -选择性Wittig反应的关键步骤。所有立体异构体均以高立体化学纯度分离。