Benzotriazole-assisted synthesis of novel mannich bases from ketones and diverse aldehydes
作者:Alan R. Katritzky、Philip A. Harris
DOI:10.1016/s0040-4020(01)81378-8
日期:1990.1
β-amino ketones are prepared in moderate to good yields by the reaction of the lithiumenolates of cyclohexanone, acetophenone, α-tetralone and camphor with the readily available adducts from an aldehyde or ketone, an amine and benzotriazole. Some diastereoselectivity is observed when the benzotriazole adduct is derivedfrom benzaldehyde.
Visible light induced photoredox catalysis is an efficient method for radical activation. Herein, we report a photoredox catalyzed intramolecular radical-radical coupling reaction that proceeds through biradical intermediate. This protocol represents...