Synthesis of Trisubstituted Oxazoles via Aryne Induced [2,3] Sigmatropic Rearrangement–Annulation Cascade
作者:Rahul N. Gaykar、Shiksha Deswal、Avishek Guin、Subrata Bhattacharjee、Akkattu T. Biju
DOI:10.1021/acs.orglett.2c01379
日期:2022.6.17
transition-metal-free, [2,3] sigmatropic rearrangement–annulation cascade of 2-substituted thio/amino acetonitriles with arynes allowing the synthesis of 2,4,5-trisubstituted oxazoles under mild conditions has been demonstrated. The key sulfur/nitrogen ylides were generated by the initial S/N arylation followed by proton transfer, which was followed by the selective [2,3] sigmatropic rearrangement involving the
已经证明,2-取代硫代/氨基乙腈与芳烃的无过渡金属、[2,3] σ 重排环化级联允许在温和条件下合成 2,4,5-三取代恶唑。关键的硫/氮叶立德是通过最初的 S/N 芳基化和质子转移产生的,然后是选择性的 [2,3] σ 重排,包括 -CN 部分和随后的环化,以合理的产率提供所需的产物.