Synthesis of [5,6]-fused pyridocoumarins through aza-Claisen rearrangement of 6-propargylaminocoumarins
作者:Theodoros S. Symeonidis、Michael G. Kallitsakis、Konstantinos E. Litinas
DOI:10.1016/j.tetlet.2011.08.012
日期:2011.10
[5,6]-Fused pyridocoumarins are prepared through aza-Claisen rearrangement and subsequent in situ cyclization of 6-propargylaminocoumarins under microwave irradiation in the presence of boron trifluoride diethyl etherate in N,N-dimethylformamide. During this process demethoxycarbonylation is observed in the corresponding 4-carbomethoxycoumarin derivatives. (C) 2011 Elsevier Ltd. All rights reserved.