A Facile and Expedient Route to Allyl and Propargyl Amines Using <b><i>N</i></b>-(α-Benzotriazolylalkyl)amines as Stabilized Iminium Salts
作者:Alan Katritzky、Satheesh Nair、Guofang Qiu
DOI:10.1055/s-2002-19801
日期:——
N-(α-Benzotriazolylalkyl)amines 1a-g serve as stabilized iminium salts for the preparation of allylamines 3a-i in 82-94% yield in two steps starting from benzotriazole, an amine, an aldehyde, and the corresponding vinyl Grignard. Propargylamines 7a-e were also prepared in good yields following the same approach using propargyl Grignard reagents.
Preparation of β-aminoesters from ketene silyl acetals and N-(alkylamino)benzotriazoles
作者:Alan.R. Katritzky、N. Shobana、Philip A. Harris
DOI:10.1016/s0040-4039(00)94482-4
日期:1990.1
A wide variety of β-aminoesters are prepared in good yields by the reaction of lithium ester enolates derived from ketene silyl acetals with N-(alkylamino)benzotriazoles. The secondary β-aminoesters readily cyclize to β-lactams (2-azetidinones) on deprotonation.
KATRITZKY, ALAN R.;HARRIS, PHILIP A., TETRAHEDRON, 46,(1990) N, C. 987-996
作者:KATRITZKY, ALAN R.、HARRIS, PHILIP A.
DOI:——
日期:——
KATRITZKY, ALAN R.;SHOBANA, N.;HARRIS, PHILIP A., TETRAHEDRON LETT., 31,(1990) N8, C. 3999-4002
作者:KATRITZKY, ALAN R.、SHOBANA, N.、HARRIS, PHILIP A.
DOI:——
日期:——
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.