Dienediolates of unsaturated carboxylic acids in synthesis. Synthesis of cyclohexenones and polycyclic ketones by tandem Michael-Dieckmann decarboxylative annulation of unsaturated carboxylic acids.
作者:María J. Aurell、Pablo Gaviña、Ramon Mestres
DOI:10.1016/s0040-4020(01)86973-8
日期:1994.2
Substituted 2-cyclohexenones 4 to 7 and hexaxydronaphthalenones and hexahydroindenones 13 to 18 are prepared by tandem Michael-Dieckmann addition of lithium dienediolates of acyclic and alicyclic unsaturated carboxylic acids to the lithium salts of the same or other unsaturated carboxylic acids.
Aurell Maria J., Gavina Pablo, Mestres Ramon, Tetrahedron, 50 (1994) N 8, S 2571-2582
作者:Aurell Maria J., Gavina Pablo, Mestres Ramon
DOI:——
日期:——
A New Annulation Reagent, 2-Oxo-3-alkenylphosphonates. Reactions with Carbonyl-Stabilized Carbanions or Silyl Enol Ethers Leading to Cyclohexenones
作者:Eiji Wada、Junji Funakoshi、Shuji Kanemasa
DOI:10.1246/bcsj.65.2456
日期:1992.9
The reactions of 2-oxo-3-alkenylphosphonates with carbonyl-stabilized carbanions directly lead to 2-cyclohexen-1-ones through a sequence of Michael reaction and intramolecular Horner–Emmons olefination. On the other hand, the Lewis acid-mediated reactions with silyl enol ethers produce 1,5-diketones as Michael adducts, which then undergo cyclization on treatment with sodium hydride or triethylamine/zinc
2-oxo-3-alkenylphosphonates 与羰基稳定的碳负离子的反应通过一系列 Michael 反应和分子内 Horner-Emmons 烯化直接导致 2-cyclohexen-1-ones。另一方面,路易斯酸介导的与甲硅烷基烯醇醚的反应产生 1,5-二酮作为迈克尔加合物,然后在用氢化钠或三乙胺/溴化锌 (II) 处理后进行环化,得到 2-环己烯-1-或 2-phosphinyl-2-cyclohexen-1-ones,分别。