Construction of 2,3-Dihydrofuran Cores through the [3+2] Cycloaddition of Gold α-Carbonylcarbenoids with Alkenes
作者:Chia-Wen Li、Guan-You Lin、Rai-Shung Liu
DOI:10.1002/chem.201000009
日期:2010.5.17
tandem reaction, amongst them α‐substitutedstyrenes, enol ethers, and 2,3‐dimethylbutadienes. Deuterium‐labeling experiments suggest a stepwise mechanism for the α‐carbonylcarbenoid/alkene [3+2] cycloaddition. The resulting 2,3‐dihydrofuran products allow access to diverse oxacyclic compounds through a stereoselective ene–oxonium reaction initiated by treatment with HOTf (1 mol %; Tf=trifluoromethanesulfonyl)