Use of 2-oxazolidinones as latent aziridine equivalents. III. Preparation of N-substituted piperazines
作者:Graham S. Poindexter、Marc A. Bruce、Karen L. LeBoulluec、Ivo Monkovic
DOI:10.1016/0040-4039(94)85306-1
日期:1994.10
A number of N-aryl and N-alkyl substituted piperazines 1 were prepared from variously substituted 2-oxazolidinone derivatives 3. The method involved treatment of 3 with HBr in glacial acetic acid followed by heating the resulting ring-opened salts 5 in alcoholic solvent. The piperazines 1a–1q were isolated by crystallization in yields ranging from 23–91%.
由各种取代的2-恶唑烷酮衍生物3制备了许多N-芳基和N-烷基取代的哌嗪1。该方法包括在冰醋酸中用HBr处理3,然后在醇溶剂中加热所得的开环盐5。通过结晶分离出哌嗪1a-1q,产率为23-91%。