描述了合成 phomactin 天然产物的对映选择性策略。使用路易斯酸引发嵌入 12 元大环的 β-碘联烯醇环化,以良好的收率和高非对映选择性获得高度官能化的双环[9.3.1]十五烷。这种碘烯酮含有天然产物 phomactin 家族 AD 环系统的取代基,适合进一步功能化。从 AD 碘烯酮中间体合成了 phomactin A 的 oxadecalin 核心。在这种不寻常的策略中,环 A 和环 B 均在大环前体内形成。
Cascade Cyclizations of Acyclic and Macrocyclic Alkynones: Studies toward the Synthesis of Phomactin A
作者:Jennifer Ciesielski、Vincent Gandon、Alison J. Frontier
DOI:10.1021/jo4007514
日期:2013.10.4
closure, while cyclizations using BF3·OEt2 as promoter occurred reversibly. For both acyclic and macrocyclic alkynones, high diastereoselectivity was observed in the intramolecular aldol reaction. The MgI2 protocol for cyclization was applied to the synthesis of advanced intermediates relevant to the synthesis of phomactin natural products, during which a novel transannular cation–olefin cyclization was
A Macrocyclic β-Iodoallenolate Intermediate Is Key: Synthesis of the ABD Core of Phomactin A
作者:Jennifer Ciesielski、Kevin Cariou、Alison J. Frontier
DOI:10.1021/ol3017116
日期:2012.8.17
An enantioselective strategy for the synthesis of phomactin natural products is described. The Lewis acid triggered cyclization of a β-iodoallenolate embedded in a 12-membered macrocycle was used to obtain a highly functionalized bicyclo[9.3.1]pentadecane in good yield and high diastereoselectivity. This iodoenone contains the substituents of the AD ring system of the phomactin family of natural products
描述了合成 phomactin 天然产物的对映选择性策略。使用路易斯酸引发嵌入 12 元大环的 β-碘联烯醇环化,以良好的收率和高非对映选择性获得高度官能化的双环[9.3.1]十五烷。这种碘烯酮含有天然产物 phomactin 家族 AD 环系统的取代基,适合进一步功能化。从 AD 碘烯酮中间体合成了 phomactin A 的 oxadecalin 核心。在这种不寻常的策略中,环 A 和环 B 均在大环前体内形成。