Synthesis of allene triazole through iron catalyzed regioselective addition to propargyl alcohols
作者:Wuming Yan、Xiaohan Ye、Keith Weise、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1039/c2cc17522c
日期:——
Allene triazole derivatives were successfully synthesized for the first time through iron catalyzed regioselective triazole addition to tertiary propargylalcohols. The reaction proceeds under mild conditions, giving the desired allene-triazoles in good to excellent yields (up to 96%). The resulting allene-triazoles were confirmed by X-ray crystallography and indicated improved stability.
mediated (3+2)-annulation of (aza)-para-quinone methides, generated in situ from propargylic alcohols and indoles, has been developed involving 1,8-conjugate addition/5-endo annulation cascade. This protocol affords a mild and effective method for the construction of synthetically important and structurally interesting functionalized pyrrolo[1,2-a]indoles.
摘要 介导的高效和简单的布朗斯台德酸(3 + 2)的(氮杂)-annulation -对-quinone甲基化物,从炔丙醇和吲哚在原位产生的,已经开发了涉及1,8-共轭加成/ 5-内切环级联。该协议提供了一种温和而有效的方法,用于构建具有重要合成意义的重要结构化吡咯并[1,2- a ]吲哚。
Bismuth(III)-Catalyzed 1,8-Addition/Cyclization/Rearrangement of Propargylic <i>para</i>-Quinone Methides with 2-Vinylphenol: Synthesis of Indeno[2,1-<i>c</i>]chromenes
The unique reactivity of in situ generated propargylic para-quinone methides as a new type of five-carbon synthon has been discovered by a novel bismuth(III)-catalyzed tandem annulation reaction. This 1,8-addition/cyclization/rearrangement cyclization cascade reaction is characterized by unusual structural reconstruction of 2-vinylphenol, involving cleavage of the C1′═C2′ bond and formation of four new