Synthesis of palmyrolide A and its cis-isomer and mechanistic insight into trans–cis isomerisation of the enamide macrocycle
作者:Satish Chandra Philkhana、B. Seetharamsingh、Yuvraj B. Dangat、Kumar Vanka、D. Srinivasa Reddy
DOI:10.1039/c3cc40541a
日期:——
Concise and protecting-group free synthesis of ent-palmyrolide A and (â)-cis-palmyrolide A were achieved starting from commercially available (S)-citronellal. The key fragment of palmyrolide A, â(5S,7S)-7-hydroxy-5,8,8-trimethylnonanamideâ, which makes up the most challenging part of the target molecule, was prepared in just three steps. A plausible mechanism for the transâcis isomerization of the double bond in the macrocycle has been investigated.
从市售的(S)-香茅醛开始,实现了ent-棕榈内酯A和(â)-顺式棕榈内酯A的简便且无保护基的合成。棕榈内酯 A 的关键片段"(5S,7S)-7-羟基-5,8,8-三甲基壬酰胺 "是目标分子中最具挑战性的部分,只需三个步骤就能制备出来。研究了大环中双键反式异构化的合理机制。