作者:Hsing-Jang Liu、Jia-Liang Zhu、Kuo-Ching Chu
DOI:10.1055/s-0030-1259052
日期:2010.12
A novel total synthesis of laurencenone C, a chamigrene sesquitepenoid natural product, has been accomplished in 11 steps. In the synthetic sequence, the B-ring of the spirocyclic core was constructed by a one-pot operation involving a Knoevenagel condensation between ethyl cyanoacetate and paraformaldehyde combined with a Diels-Alder reaction of the resulting ethyl 2-cyanoacrylate with isoprene. Moreover
月桂烯酮 C 的新型全合成是一种 chamigrene 倍半萜类天然产物,已通过 11 个步骤完成。在合成序列中,螺环核的 B 环是通过一锅操作构建的,包括氰乙酸乙酯和多聚甲醛之间的 Knoevenagel 缩合以及所得 2-氰基丙烯酸乙酯与异戊二烯的 Diels-Alder 反应。此外,采用萘基锂诱导的 Diels-Alder 加合物的还原烷基化来创建 C-6 四元中心并为组装 A 环奠定基础。