作者:Scott A. Snyder、Trevor C. Sherwood、Audrey G. Ross
DOI:10.1002/anie.201002264
日期:——
A polycyclic collapse: Use of a carefully designed acyclic intermediate participated in a cascade reaction that formed the entire core of the polyketide‐derived dalesconols in a single flask (see scheme). A number of additional and carefully controlled synthetic operations completed an expeditious synthesis of both of these highly bioactive natural products as well as structural congenors.
immunosuppressants (+)-dalesconol A and B in a highly efficient and concise manner, which features an efficient palladium-catalyzed enantioselective dearomative cyclization-kinetic resolutioncascade to install the chiralall-carbonquaternarycenter, an effective sterically hindered Stille coupling, a powerful 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) oxidation to furnish all requisite unsaturation, and a tandem
我们在此以高效简洁的方式报告了免疫抑制剂 (+)-dalesconol A 和 B 的首次对映选择性合成,其特点是高效的钯催化对映选择性脱芳环化-动力学拆分级联反应安装手性全碳四元中心,有效的空间位阻斯蒂尔偶联、强大的 2,3-二氯-5,6-二氰基-1,4-苯醌 (DDQ) 氧化以提供所有必需的不饱和度,以及串联水解-闭环序列。
[EN] SYNTHESIS OF THE POTENT IMMUNOSUPPRESSANT AGENTS DALESCONOL A AND B<br/>[FR] SYNTHÈSE DES AGENTS IMMUNOSUPPRESSIFS PUISSANTS, LE DALESCONOL A ET B