Studies on Horner-Wadsworth-Emmons reaction in base sensitive ketones: Synthesis of (−)-mitsugashiwalactone and formal synthesis of (+)-iridomyrmecin, (−)-isoiridomyrmecin and (+)-teucriumlactone
作者:A Nangia、G Prasuna
DOI:10.1016/0040-4020(96)00023-3
日期:1996.3
The effect of different bases in promoting Horner-Wadsworth-Emmons (HWE) reaction on enolisable cyclopentanones is investigated. NaH is found to be suitable for the intermolecular reaction and DBU/LiCl is optimal for the intramolecular variation. The HWE approach is employed for the enantioselective synthesis of iridoid cyclopentapyranones of type-I (4,16,52) and type-II (5,36).
研究了不同碱促进霍纳-沃兹沃思-埃蒙斯(HWE)反应对可烯化环戊酮的影响。发现NaH适合分子间反应,而DBU / LiCl最适合分子内变化。HWE方法用于对映体选择性合成I型(4,16,52)和II型(5,36)的虹彩状环戊吡喃酮。