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.
A General Method for the Preparation of β-Aminoesters
作者:Alan R. Katritzky、Konstantina Yannakopoulou
DOI:10.1055/s-1989-27381
日期:——
3-Dialkylamino (3) and 3-benzyloxycarbonylamino (6) esters are prepared by the Reformatsky reaction of 1-dialkylamino-(1) and 1-benzyloxycarbonylamino-(5) 1-(1-benzotriazolyl)alkanes with ethyl 2-bromoalkanoates. Compounds 1 and 5 are obtained by the condensation of benzotriazole, an aldehyde, and a secondary amine or benzyl carbamate. The procedure can be performed by as a one-pot reaction from benzotriazole.