Facile and highly efficient method for the C-alkylation of 2-hydroxy-1,4-naphthoquinone to nitroalkenes under catalyst-free ‘on water’ conditions
作者:Deepak Kumar Barange、Veerababurao Kavala、B. Rama Raju、Chun-Wei Kuo、Chi Tseng、Yu-Chen Tu、Ching-Fa Yao
DOI:10.1016/j.tetlet.2009.06.107
日期:2009.9
C-Alkylation of 2-hydroxy-1,4-naphthoquinone to various nitroolefins was achieved under catalyst-free employing 'on water' conditions. The mechanism for the formation can be explained oil the basis of dual activation of nitroalkene and 2-hydroxy-1,4-naphthoquinones via hydrogen bonding. Simple reaction conditions, high yields of the products, and environmentally benign medium are attractive features of this method. (C) 2009 Elsevier Ltd. All rights reserved.