Highly (≥98%) Stereo- and Regioselective Trisubstituted Alkene Synthesis of Wide Applicability via 1-Halo-1-alkyne Hydro- boration-Tandem Negishi-Suzuki Coupling or Organoborate Migratory Insertion
作者:Shiqing Xu、Ching-Tien Lee、Honghua Rao、Ei-ichi Negishi
DOI:10.1002/adsc.201100420
日期:2011.11
synthetic utility of the present methodology has been demonstrated in the highly selective synthesis of side chain (4) of scyphostatin in 28% yield over nine steps in the longest linear sequence from allyl alcohol. Thus, this new tandem protocol has been emerged as the most widely applicable and highly selective route to trisubstituted alkenes including those that are otherwise difficult to prepare.
然后用有机锂或格氏试剂处理以产生具有反向立体构型的三取代烯烃。本方法的合成效用已在从烯丙醇以最长线性序列的九个步骤以 28% 的收率高选择性合成 scyphostatin 的侧链 (4) 中得到证明。因此,这种新的串联方案已成为最广泛适用和高度选择性的三取代烯烃路线,包括那些难以制备的烯烃。