Synthesis of 5-aryl-2-piperidino-5H-chromeno[3,4-c]pyridine-1-carbonitriles
4-Chloro-2-aryl-2H-3-chromenecarbaldehydes 3a-g on reaction with malononitrile in ethanol in the presence of piperidine gave 5-aryl-2-piperidino- 5H-chromeno[3,4-c]pyridine-1-carbonitriles 4a-g in good yields. ARKAT-USA, Inc.
Venkati,Reddy, S. Satyanarayana,Swamy,Ravikumar,Krupadanam, G. L. David
experimental part
p. 355 - 364
(2012/06/29)
A facile synthesis of ethyl-2-methyl-5-aryl-5H-chromeno-[3,4-c]pyridine-1-carboxylates
Flav-4-ones on reaction with DMF/POCl3 gave 4-chloro-2-aryl-2H-chromene-3-carbaldehydes which on reaction with ethyl-3-aminocrotonate give under Hantszch reaction conditions ethyl-2-methyl-5-aryl-5H-chromeno[3,4-c]pyridine-1-carboxylates in good yields.
Venkati,Krupadanam
p. 2589 - 2598
(2007/10/03)
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