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Modulation of the Cs2CO3-promoted catalytic amination by a crown ether
Y Torisawa1, T Nishi, J Minamikawa
1Process Research Laboratory, Second Tokushima Factory, Otsuka Pharmaceutical Co., Ltd, Japan. torisawa@fact.otsuka.co.jp
Bioorganic & Medicinal Chemistry Letters
|November 15, 2000
Abstract:
The catalytic addition of 18-Crown-6 in some Cs2CO3-promoted amination of triflates and bromides was beneficial to improve sluggish reaction with suppression of the unwanted side products. The protocol was useful for the preparation of chlorinated aryl piperazines from phenol derivatives.