An Umpolung Oxa-[2,3] Sigmatropic Rearrangement Employing Arynes for the Synthesis of Functionalized Enol Ethers
作者:Rahul N. Gaykar、Malini George、Avishek Guin、Subrata Bhattacharjee、Akkattu T. Biju
DOI:10.1021/acs.orglett.1c00911
日期:2021.5.7
An oxa-[2,3] sigmatropic rearrangement involving arynes is reported featuring the umpolung of ketones, where the C═O bond polarity is reversed. The in situ-generated sulfur ylides from β-keto thioethers and arynes undergo efficient rearrangement allowing the facile and robust synthesis of functionalized enol ethers in high yields and excellent functional group compatibility. Preliminary mechanistic
据报道涉及芳烃的oxa- [2,3]σ重排以酮为主体,其中的C═O键极性相反。β-酮硫醚和芳烃在原位生成的硫烷基化物经过有效的重排,可以轻松,稳健地合成高官能度的烯醇醚,并具有出色的官能团相容性。初步的机理研究排除了在这种情况下运行Pummerer型重排的可能性。