作者:Noriki Kutsumura、Yusuke Matsubara、Takuya Honjo、Tadaaki Ohgiya、Shigeru Nishiyama、Takao Saito
DOI:10.1016/j.tet.2015.02.093
日期:2015.4
The first total synthesis of (−)-5,6-seco-germacrane lactone has been achieved. The synthetic highlight of our approach includes sp2–sp3 Suzuki–Miyaura cross coupling of a vinyl bromide and an alkyl 9-BBN derivative. The vinyl bromide was easily prepared from the chiral lactonic building block using a one-pot regioselective bromination. The asymmetric carbon center of the alkyl boron compound was formed
( - ) -的第一全合成5,6-开环-germacrane内酯已经实现。我们方法的综合亮点包括乙烯基溴和烷基9-BBN衍生物的sp 2 -sp 3 Suzuki-Miyaura交叉偶联。使用一锅区域选择性溴化反应,可以很容易地从手性内酯结构单元中制备乙烯基溴化物。烷基硼化合物的不对称碳中心是通过锆催化的2,5-二氢呋喃的碳镁形成的。