Preparation of β-Amido Ketones and Aldehydes via Amidoalkylation of Enamines, Enol Silyl Ethers, and Vinyl Ethers
摘要:
Novel syntheses of beta-amidoalkyl ketones and aldehydes via amidoalkylations of enamines, silyl enol ethers, and vinyl. ethers with N-(1-benzotriazol-1-ylalkyl)amides are described.
The conversion of secondary into tertiary amides using benzotriazole methodology
作者:Alan R. Katritzky、Guowei Yao、Xiangfu Lan、Xiaohong Zhao
DOI:10.1021/jo00060a025
日期:1993.4
N-Alkyl-N-[1-(benzotriazol-1-yl)alkyl]amides, easily prepared from benzotriazole, an aldehyde, and a secondary amide, react readily with organozinc reagents to give tertiary amides in moderate to good yields. They are also reduced by LiAlH4 to afford tertiary amines.
An Intramolecular Schmidt Reaction of δ-Azido <i>N</i>-Acylbenzotriazoles
A Lewis acid promoted intramolecular Schmidtreaction of N-acylbenzotriazoles with alkyl azides was designed and realized. The benzotriazole was not only employed as an efficient activator for initiating the Schmidt rearrangement but also used as a powerful terminator for the subsequent nucleophilic trapping of the isocyanate ion and/or N-acyliminium ion from the rearrangement. Thirteen δ-azido N-acylbenzotriazoles
Preparation of β<i>-</i>Amido Ketones and Aldehydes via Amidoalkylation of Enamines, Enol Silyl Ethers, and Vinyl Ethers
作者:Alan R. Katritzky、Yunfeng Fang、Alina Silina
DOI:10.1021/jo990608u
日期:1999.10.1
Novel syntheses of beta-amidoalkyl ketones and aldehydes via amidoalkylations of enamines, silyl enol ethers, and vinyl. ethers with N-(1-benzotriazol-1-ylalkyl)amides are described.