213273-06-4

Upstream product

• 100-65-2 N-Phenylhydroxylamine 
• 98-95-3 nitrobenzene 
• 762-42-5 dimethyl acetylenedicarboxylate 
• 213273-02-0 N-((6-methyl-4-oxo-4H-chromen-3-yl)methylene)aniline oxide 
• 213273-05-3 6-Methyl-4-oxo-2-phenylamino-4H-chromene-3-carbaldehyde 
• 1535170-92-3 4-chloro-3-dichloromethyl-2-(N-phenyl)imino-6-methyl-2H-1-benzopyran 

Relevant academic research and scientific papers

POCl3-mediated synthesis of 2-N-arylimino-4-chloro-3- dichloromethylcoumarin and its conversion into 6H-[1]benzopyrano[4,3-b]quinolin- 6-one

On heating in POCl3, 2-(N-aryl)aminochromone-3-carbaldehyde produced 2-N-arylimino-4-chloro-3-dichloromethylcoumarin, which undergoes selective acid-catalyzed hydrolysis of its imino function to produce 4-chioro-3-dichloromethylcoumarin. The hy

Exploring α-chromonyl nitrones as 1,5-dipoles

N-Phenyl-C-chromonyl nitrones 1 and the allenoate zwitterion 2, generated by addition of phosphine to acetylenedicarboxylates, undergo a cascade reaction sequence involving an unprecedented [5+3] annulation followed by deoxygenative rearrangement leading to dihydropyridine-fused benzopyrones. Unusual electronic control by the N-substituents of 1 directs the annulation pathway, leading to two different ring-systems. Georg Thieme Verlag Stuttgart - New York.

Thermal rearrangements of C-(4-Oxo-4H[1]benzopyran-3-yl)-N- phenylnitrone-a route to novel quinolino[2,3-b] chroman-12-ones

C-(4-Oxo-4H[1]benzopyran-3-yl)-N-phenylnitrones (1a-c) undergo facile rearrangements on refluxing in benzene, yielding 2-(N-phenylamino)-4-oxo- 4H[1]-benzopyran-3-carboxaldehydes (2a-c,70%) and 3-(phenyliminomethylene)- chroman-2,4-diones (3a-c, 25%). 2a-