1173277-76-3Relevant academic research and scientific papers
A one-pot synthesis of 3,3′-methylenebis(2-arylamino-4H-chromen-4-one) from C-(4-oxo-4H-1-benzopyran-3-yl)-N-arylnitrone
Maiti, Sourav,Panja, Suman Kalyan,Bandyopadhyay, Chandrakanta
, p. 3966 - 3969 (2009)
2-(Arylamino)-4-oxo-4H-chromene-3-carbaldehyde 3 (R2 = aryl) produces 12H-chromeno[2,3-b]quinolin-12-one 4 when treated with sarcosine, piperidine or diethylamine, but produces 3,3′-methylenebis(2-arylamino-4H-chromen-4-one) 8 when treated with
Synthesis of 6,8-diarylimino-7H-pyrano[3,2-c:5,6-c'] dicoumarins; chemoselective hydrolysis of the ether-and imino-functions
Maiti, Sourav,Panja, Suman Kalyan,Bandyopadhyay, Chandrakanta
scheme or table, p. 84 - 86 (2011/06/27)
POCl3-induced dehydration of 3,3′-methylenedi(2-arylamino- 4H-chromen-4-ones) gives 6,8-diarylimino-7H-pyrano[3,2-c:5,6-c']dicoumarins, which undergo chemoselective hydrolysis of the imino function to form 7H-pyrano[3,2-c:5,6-c']dicoumarins by heating with HCl in methanol However, cleavage of the ether function occurs upon heating in acetic acid to give 3,3′-methylenedi(2-arylamino-4H-chromen-4-ones).
