Base-Free and Catalyst-Free Synthesis of Functionalized Dihydrobenzoxazoles via Vinylogous Carbonate to Carbamate Rearrangement
作者:Tamal Kanti Das、Santigopal Mondal、Rajesh G. Gonnade、Akkattu T. Biju
DOI:10.1021/acs.orglett.7b02733
日期:2017.10.20
catalyst-free, and base-free intramolecular cyclization of N-aryloxyacrylate aldimines, under thermal conditions leading to the synthesis of functionalized dihydrobenzoxazoles, is reported. The reaction features a unique rearrangement of vinylogous carbonates to vinylogous carbamates resulting in a new carbon–oxygen and carbon–nitrogen bond construction. The reaction tolerates a broad range of functional
据报道,在热条件下,N-芳氧基丙烯酸丙烯酸醛亚胺发生了意想不到的,无催化剂和无碱的分子内环化反应,导致合成了官能化的二氢苯并恶唑。该反应具有将碳酸乙烯基酯重新排列为氨基甲酸乙烯基酯的独特功能,从而产生了新的碳-氧和碳-氮键结构。该反应可耐受各种官能团,并且以中等至良好的产率形成所需的产物。