Stereoselective Synthesis of 1,2,3-Trisubstituted 1,3-Dienes through Novel [3,3]-Sigmatropic Rearrangements in ?-Allenic Methanesulfonates: Application to the Preparation of Fused Tricyclic Systems by Tandem Rearrangement/Diels?Alder Reaction
作者:Benito Alcaide、Pedro Almendros、Cristina Aragoncillo、Mar�a�C. Redondo
DOI:10.1002/ejoc.200400527
日期:2005.1
rearrangement. This reactivity pattern was incorporated into a domino process, allowing the development of a novel one-pot synthetic strategy for the preparation of fused tricycles from monocyclic allenols, masked functionalized dienes, when subjected to a domino allenol transposition/intramolecular Diels−Alder reaction process. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
仅通过甲磺酰氯/叔胺体系处理,从 α-烯丙醇合成 1,2,3-三取代的 1,3-二烯的前所未有的立体选择性和通用合成已被开发出来。这种转变可以暂时解释为甲磺酰基在最初形成的 α-丙二烯甲磺酸酯中的迁移,通过 [3,3]-σ 重排得到相应的甲磺酰二烯。这种反应模式被纳入多米诺骨牌过程,允许开发一种新的单锅合成策略,用于从单环丙烯醇、掩蔽的官能化二烯制备稠合三环,当进行多米诺丙烯醇转位/分子内 Diels-Alder 反应过程时。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)