In the context of a synthesis of phenalamide A2, the C-9 to C-18 building block 6 was synthesized. The stereogenic centers were generated by alkylation of an Evans oxazolidinone 12 and by a crotylboration reaction using the enantiomerically pure (E)-α-chlorocrotylboronate (4).
在合成苯甲酰胺 A2 的过程中,合成了 C-9 至 C-18 结构单元 6。对映体纯度为 (E)-δ-chlorocrotylboronate (4) 的伊文思
噁唑烷酮 12 通过烷基化反应和
巴豆硼化反应生成了立体中心。