245364-50-5Relevant articles and documents
N-carboalkoxy-2-nitrobenzenesulfonamides: A practical preparation of N- Boc-, N-Alloc-, and N-Cbz-protected primary amines
Fukuyama, Tohru,Cheung, Mui,Kan, Toshiyuki
, p. 1301 - 1303 (2007/10/03)
N-Carboalkoxy-2-nitrobenzenesulfonamides, readily prepared by acylation of 2-nitrobenzenesulfonamide (o-NsNH2), can be alkylated by either conventional or Mitsunobu protocols. Since the o-nosyl group can be deprotected under mild conditions, a variety of N-carboalkoxy derivatives of primary amines may be prepared in excellent yields from the corresponding alcohols and/or halides. In addition, allyloxycarbonyl (Alloc), t- butoxycarbonyl (t-Boc), and benzyloxycarbonyl (Cbz) groups can be deprotected in the presence of the o-nosyl group, allowing the resultant N-alkylated 2- nitrobenzenesulfonamides to be used for further preparation of secondary amines.