Regioselective Synthesis of 3‐Substituted Pyrroles by Nucleophilic Addition of 3‐(1‐Arylsulfonylalkyl) Pyrroles Activated under Basic or Acid Conditions
作者:Fabio Martinelli、Alessandro Palmieri、Marino Petrini
DOI:10.1002/chem.201100434
日期:2011.6.20
Conditioned pyrroles! Sulfonyl pyrroles, obtained regioselectively from commercial N‐triisopropylsilylpyrrole, undergo removal of the arylsulfonyl group under basic or acidic conditions to give vinylogous imino‐like derivatives (see scheme; TIPS=triisopropylsilyl). These electrophilic intermediates react with nucleophilic reagents to give 3‐functionalized pyrroles.
条件吡咯!从市售N-三异丙基甲硅烷基吡咯区域选择性地获得的磺酰基吡咯在碱性或酸性条件下会除去芳基磺酰基,得到乙烯基亚氨基的类衍生物(见方案; TIPS =三异丙基甲硅烷基)。这些亲电子中间体与亲核试剂反应,生成3-官能化的吡咯。