New Strategies for the Efficient Synthesis of Medium-Sized Bicyclic γ-Alkylidenebutenolides Based on Regioselective Cyclizations of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Oxalyl Chloride
作者:Peter Langer、Tobias Eckardt、Nehad N. R. Saleh、Inass Karimé、Peter Müller
DOI:10.1002/1099-0690(200110)2001:19<3657::aid-ejoc3657>3.0.co;2-5
日期:2001.10
efficiently prepared by Me3SiOTf-catalyzed cyclization of cyclic bis(silyl enol ethers) with oxalyl chloride. In addition, a new strategy for the synthesis of medium-sized bicyclic hybrids of butenolides and medium-sized cyclic ethers − based on sequential [3+2] cyclization of 1,3-bis(trimethylsilyloxy)-1,3-butadienes, Mitsunobu reaction, and ring-closing metathesis − is reported.
通过 Me3SiOTf 催化环状双(甲硅烷基烯醇醚)与草酰氯的环化反应,有效地制备了中等大小的双环 γ-亚烷基丁烯内酯。此外,合成中型丁烯内酯和中型环醚的双环杂化物的新策略 - 基于 1,3-双(三甲基甲硅烷氧基)-1,3-丁二烯的顺序 [3+2] 环化,Mitsunobu反应和闭环复分解 - 报道。