Transition-Metal-Free Alkylation and Acylation of Benzoxazinones with 1,4-Dihydropyridines
作者:Youjung Byun、Junghyea Moon、Won An、Neeraj Kumar Mishra、Hyung Sik Kim、Prithwish Ghosh、In Su Kim
DOI:10.1021/acs.joc.1c01558
日期:2021.9.3
vital transformation for the development of pharmaceuticals, functional materials, and other chemical entities. Herein, the transition-metal-free alkylation and acylation of C(sp2)–H bonds in biologically relevant 2-benzoxazinones with 1,4-dihydropyridines as readily accessible radical surrogates is described. Excellent functional group compatibility and a broad substrate scope were attained. Gram-scale
Asymmetric alkenylation reaction of benzoxazinones with diarylethylenes catalyzed by B(C6F5)3/chiral phosphoric acid
作者:Zhen Liu、Zhi-Yuan Ren、Chen Yang、Xiangyi Shao、Li Chen、Xin Li
DOI:10.1016/j.cclet.2023.108939
日期:2024.5
Catalytic enantioselective alkenylation is an efficient method to construct chiral alkene molecules, but the asymmetric alkenylation of simplealkenes catalyzed by metal-free catalysts remains an elusive challenge. Herein, we reported an asymmetric alkenylation of benzoxazinones with diarylethylenes by utilizing a B(CF)/chiral phosphoric acid catalyst. A broad of benzoxazinones and diarylethylenes
B(C6F5)3/Chiral Phosphoric Acid Catalyzed Asymmetric Aza-Diels–Alder Reaction of Imines and Unactivated Dienes
作者:Zhen Liu、Qing-Chun Qian、Li-Ming Chen、Xin Li
DOI:10.1021/acs.orglett.4c00874
日期:2024.4.19
Herein, we report an asymmetric aza-Diels–Alderreaction of quinoxalinones or benzoxazinones with unactivated dienes by utilizing a B(C6F5)3/chiral phosphoric acid catalyst to construct chiral six-membered N-heterocycles. Various quinoxalinones or benzoxazinones with electron-withdrawing and electron-donating groups and unactivated dienes were tolerated (up to 99% yield and 99% ee) in the methodology