Total synthesis of two novel brominated acetylenic diols (+)-diplyne C and E: stereoselective construction of the (E)-1-bromo-1-alkene
作者:Benjamin W. Gung、Craig Gibeau、Amanda Jones
DOI:10.1016/j.tetasy.2005.08.019
日期:2005.9
The total syntheses of the enantiomers of two novel brominated polyacetylenic natural products diplynes C and E are reported. Pd and Cu(I)-catalyzed coupling reactions were employed to synthesize the diyne and enyne units. The stereochemistry of the terminal (E)-alkenyl bromide in diplyne C was constructed stereoselectively using Brown’s hydroboration–bromination procedure. The stereochemistry of the
报道了两种新型溴化聚炔天然产物二烯C和E的对映体的总合成。Pd和Cu(I)催化的偶联反应用于合成二炔和烯炔单元。使用布朗的硼氢化-溴化程序立体选择性地构建了二烯C中末端(E)-烯基溴化物的立体化学。使用Takai反应建立二烯E中内部(E)-双键的立体化学。立体中心衍生自d-甘露醇。