Ring Expansion and 1,2‐Migration Cascade of Benzisoxazoles with Ynamides: Experimental and Theoretical Studies
作者:Rajeshwer Vanjari、Shubham Dutta、B. Prabagar、Vincent Gandon、Akhila K. Sahoo
DOI:10.1002/asia.201901251
日期:2019.12.13
α-imino vinylic gold intermediate, and 1,2-migration of the sulfonamide motif to the masked carbene center to deliver the respective ring-expanded benzo[e][1,3]oxazine of predominant E configuration. A trapping experiment justifies the participation of the α-imino masked gold carbene. DFT computations also support the hypothesized mechanism and rationalize the product stereoselectivity.