Reaction of 1-Methylpyrrole with 1,3-Dichloro-5,5-disubstituted Hydantoins: Products and AM1 Study of Intermediates
摘要:
The reaction of 1-methylpyrrole with 1,3-dichloro-5,5-dimethylhydantoin gave 3-(1-methyl-1H-pyrrol-2-yl)-5,5-dimethylhydantoin and 1,3-di-(1-methyl-1H-pyrrol-2-yl)-5,5-dimethylhydantoin as products. In contrast reaction with 1,3-dichloro-5-methyl-5-phenylhydantoin (3) or 1,3-dichloro-5,5-diphenylhydantoin (4) gave only the monopyrroylhydantoin derivatives. This difference was attributed to a steric interaction between the substituents on C-5 and N1.
A simple and expedient method for the preparation of N-chlorohydantoins
摘要:
A simple and efficient methodology for the preparation of N-chlorinated hydantoins is presented. These versatile chlorenium sources were isolated in high yield after a simple recrystaillization. Among the ten examples are the first chiral N-chlorohydantoins. (C) 2008 Elsevier Ltd. All rights reserved.