The Hey-Elks route to arylated pyridines has been utilised in the synthesis of 3-azafluorenes.The pyrido-coumarin (23) and the related chromene (24) have been synthesised.
Chatterjea, J. N.,Shaw, S. C.,Prasad, Y.,Singh, R. P.
p. 1028 - 1031
(2007/10/02)
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