Enantioselective iridium catalyzed α-alkylation of azlactones by a tandem asymmetric allylic alkylation/aza-Cope rearrangement
作者:Xue-Dan Bai、Qing-Feng Zhang、Ying He
DOI:10.1039/c9cc01450k
日期:——
The development of an iridium catalyzedenantioselective α-alkylation of azlactones has been described. The reaction provides rapid access to a wide range of enantio-enriched quaternary carbon center allylated 2,4-diaryloxazol-5(2H)-ones in excellent yields with high enantioselectivities. The transformation was achieved through a tandem allylicalkylation/aza-Cope rearrangement, affording the desired
(4 + 2) cyclization of aza-<i>o</i>-quinone methides with azlactones: construction of biologically important dihydroquinolinone frameworks
作者:Hai-Qing Wang、Wenjing Ma、Ao Sun、Xin-Yue Sun、Chao Jiang、Yu-Chen Zhang、Feng Shi
DOI:10.1039/d0ob02388d
日期:——
A base-promoted (4 + 2) cyclization of N-(o-chloromethyl)aryl amides with azlactones was established, which helped construct biologically important dihydroquinolinone frameworks in good yields.