2-borylindoles via the copper(I)-catalyzed borylative cyclization of 2-alkenylphenyl isocyanides using diboronate. The reaction proceeds at room temperature under neutral conditions and exhibits high tolerance to functional groups, such as Br, CO2R, COR, CONMe2, and CN. The 2-borylindoles synthesized in the present study can be elaborated into an array of indole-based derivatives, for example, through the
Facile Synthesis of Functionalized 1,4‐Benzodiazepine‐3‐One‐5‐Acetates via [4 + 3]‐Annulation of Azaoxyallyl Cations With 2‐Aminophenyl α,β‐Unsaturated Esters
作者:Hyun Sun Jang、Yong Il Kwon、Sung‐Gon Kim
DOI:10.1002/bkcs.12060
日期:2020.7
metal‐free [4 + 3]‐annulation of α‐halohydroxamates with 2‐aminophenyl α,β‐unsaturated esters has been developed for the construction of seven‐membered 1,4‐benzodiazepine‐3‐one‐5‐acetates in moderate to good yields (up to 82% yield). The annulation involved the cascade reaction of an generation of azaoxyallyl cation, aza‐addition to this azaoxyallyl cation, and intramolecular aza‐Michael reaction to yield 1