Cyclization Reaction of 2-Azido-1-(2-hydroxyphenyl)ethanones with Terminal Alkynoates Catalyzed by 4-Dimethylaminopyridine (DMAP): Synthesis of 2-Aminobenzofuran-3(2H)-one Derivatives
作者:Ling-Guo Meng、Ni-Lin Ge、Ming-Ming Yang、Lei Wang
DOI:10.1002/ejoc.201100250
日期:2011.7
An unexpected cyclization reaction of 2-azido-1-(2-hydroxyphenyl)ethanones with terminal alkynoates catalyzed by 4-dimethylaminopyridine (DMAP) was developed, and 2-aminobenzofuran-3(2H)-one derivatives were obtained in moderate to good yields under mild reaction conditions within 2 h. The scope and limitations of the cyclization reactions were also investigated.
photocatalysis and biocatalysis allows for the repurposing of the ‘ene’-reductase enzyme GluER to achieve the enantioselectivesynthesis of benzo-fused heterocycles, and various benzoxepinones, chromanone and indanone were specifically afforded in high yields with good to excellent enantioselectivities after protein engineering of GluER.