Nitroketene dithioacetal chemistry: Synthesis of 2-alkylthio-3-nitrothiophenes from nitroketene dithioacetate and chloromethyl ketones
作者:H. Surya Prakash Rao、K. Vasantham
DOI:10.1021/jo9008639
日期:2009.9.4
An effective synthesis of highly functionalized 3-nitrothiophenes was achieved from the reaction of simple, inexpensive, and readily available dipotassium 2-nitro-1,1-ethylyenedithiolate with α-chloromethyl ketones in toluene catalyzed by tetrabutylammonium bromide (TBAB). Thiophene formation is highly sensitive and selective for chlorine, present as a leaving group in α-chloromethyl ketones.