Synthesis of Medium-Bridged Twisted Lactams via Cation−π Control of the Regiochemistry of the Intramolecular Schmidt Reaction
作者:Michal Szostak、Lei Yao、Jeffrey Aubé
DOI:10.1021/jo902574m
日期:2010.2.19
diazonium cation. This results in the rarely observed rearrangement of the C−C bond distal to the azidoalkyl chain. This reaction pathway also requires the azide-containing tether to be situated in the axial orientation in the key azidohydrin intermediate. Examination of the effect of substitution of aromatic rings on the regiochemistry of the Schmidt reaction shows an increase in the migratory selectivity
Cation−π Control of Regiochemistry of Intramolecular Schmidt Reactions en Route to Bridged Bicyclic Lactams
作者:Lei Yao、Jeffrey Aubé
DOI:10.1021/ja068919r
日期:2007.3.1
structures. Not surprisingly, the tendency of these compounds to undergo rapid hydrolysis has complicated their synthesis. Although standard methods for amide bond formation have been used, such routes often proceed in poor yields or are accompanied by difficulty in product isolation.1 In this paper, we describe a solution to the problem of bridged bicyclic lactam synthesis that utilizes the acid-promoted