Synthesis of Highly Substituted Furans by a Cascade of Formal <i>anti</i>-Carbopalladation/Hydroxylation and Elimination
作者:Theresa Schitter、Naveen J. Roy、Peter G. Jones、Daniel B. Werz
DOI:10.1021/acs.orglett.8b03732
日期:2019.2.1
substituted furans are generated by a cascade of formal anti-carbopalladation, attack of a nucleophilic hydroxy group, and aromatization by elimination of the emerging dihydrofuran derivative. Mono-, di-, and trisubstituted furans were obtained in good to excellent yields. When we attempted to access tetrasubstituted furan derivatives, an additional rearrangement was observed that resulted in the formation
高度取代的呋喃是通过级联的正式抗卡巴拉定,级联亲核羟基和消除新出现的二氢呋喃衍生物进行芳构化而生成的。获得单,二和三取代的呋喃,收率良好至优异。当我们尝试使用四取代的呋喃衍生物时,观察到另外的重排,导致形成色烯。后续化学表明,TMS可用作炔烃部分的保护基。