A new entry into cis-3-amino-2-methylpyrrolidines viaring expansion of 2-(2-hydroxyethyl)-3-methylaziridines
作者:Matthias D'hooghe、Wim Aelterman、Norbert De Kimpe
DOI:10.1039/b816617j
日期:——
3-Amino-2-methylpyrrolidines were prepared via a novel protocol, involving the reductive ring closure and O-deprotection of γ-acetoxy-α-chloroketimines towards 2-(2-hydroxyethyl)-3-methylaziridines, followed by ringexpansion of the latter into 3-bromopyrrolidines via intermediate bicyclic aziridinium salts and consecutive nucleophilic displacement of the bromo atom by azide towards 3-azidopyrrolidines