ABSTRACT. The synthetic route to coumarin systems is well established and one approach of particular interest leads to the intermediate 7-diethylamino-3-formylcoumarin. A combination of the N, N-diethylamino-coumarin donor with a wide range of acceptor groups of varying electron withdrawing strength should permit the synthesis of a series of extended coumarin dyes with absorption maxima range from 500 to 600 nm, or even beyond. In this ...
[Kim, Ja Hyung; Kim, Hyun Jung; Kim, Sang Hoon; Lee, Jae Hong; Do, Jung Ho; Kim, Hae-Jo; Lee, Joung Hae; Kim, Jong Seung Tetrahedron Letters, 2009 , vol. 50, # 43 p. 5958 - 5961]
