Intramolecular and intermolecular ketone–ester reductive coupling reactions promoted by samarium(II) iodide
作者:Yunkui Liu、Yongmin Zhang
DOI:10.1016/s0040-4039(01)01107-8
日期:2001.8
Intramolecular and intermolecular ketone–ester reductivecouplingreactionspromoted by SmI2 have been studied. Substituted 2-hydroxy-5-ethoxycarbonylcyclopentanones, 5-ethoxycarbonylcyclopentenones and α-ketols were prepared in moderate to good yields at room temperature or under reflux under neutral conditions.
Low-valent titanium induced reductive coupling reaction of carboxylic derivatives with aromatic ketones
作者:Da-qing Shi、Jian-xie Chen、Wen-ying Chai、Wei-xing Chen、Tsi-yu Kao
DOI:10.1016/s0040-4039(00)60493-8
日期:1993.4
The intermolecular and intramolecular coupling reaction of carboxylic derivaties with aromatic ketones induced by titaniumtetrachloride and zinc powder was studied.
研究了四氯化钛和锌粉诱导的羧酸衍生物与芳族酮的分子间和分子内偶联反应。
Base-Controlled Selective Conversion of Michael Adducts of Malonates with Enones in the Presence of Iodine
作者:Chun-Bao Miao、Min Zhang、Zong-Yong Tian、Hai-Tao Xi、Xiao-Qiang Sun、Hai-Tao Yang
DOI:10.1021/jo201879t
日期:2011.12.2
An efficient base-controlled selective conversion of the Michael adducts of malonates with enones in the presence of iodine is reported. Highly functionalized cyclopropane, oxetane, and α-hydroxylmalonate derivatives are obtained selectively using DBU, Na2CO3, and NaOAc as the base, respectively. O2 was identified to be crucial to the formation of oxetane and α-hydroxylmalonate derivatives.
据报道在碘存在下,丙二酸酯的迈克尔加成物与烯酮的有效的碱控制的选择性转化。分别使用DBU,Na 2 CO 3和NaOAc作为碱分别选择性地获得高度官能化的环丙烷,氧杂环丁烷和α-羟基丙二酸酯衍生物。O 2被确定对于氧杂环丁烷和α-羟基丙二酸酯衍生物的形成至关重要。
Solvent-Controlled Oxidative Cyclization for Divergent Synthesis of Highly Functionalized Oxetanes and Cyclopropanes
作者:Yang Ye、Chen Zheng、Renhua Fan
DOI:10.1021/ol9012102
日期:2009.7.16
An efficient solvent-controlled oxidative cyclization of Michael adducts of malonates with chalcones with the combination of iodosobenzene and tetrabutylammonium iodide is reported. Highly functionalized oxetanes and cyclopropanes were divergently synthesized in moderate to excellent yields with high diastereoselectivity.