38370-06-8

Upstream product

• 98078-80-9 2-(2-Hydroxyphenyl)-4,5-diimino-3,4-dihydro-5H-<1>benzopyrano<4,3-d>pyrimidine 
• 105950-28-5 2-(2-Hydroxyphenyl)-4-methylthio-5-oxo-5H-<1>benzopyrano<4,3-d>pyrimidine 
• 102964-56-7 4--2-(2-hydroxyphenyl)-4H-1,3-benzoxazine 
• 98078-82-1 2-(2-Hydroxyphenyl)-5-imino-4-thioxo-3,4-dihydro-5H-<1>benzopyrano<4,3-d>pyrimidine 
• 90681-65-5 4-Dicyanomethylene-2-(2-hydroxyphenyl)-4H-1,3-benzoxazine 
• 105950-27-4 2-(2-Hydroxyphenyl)-5-imino-4-methylthio-5H-<1>benzopyrano<4,3-d>pyrimidine 
• 98078-84-3 2-(2-Hydroxyphenyl)-5-oxo-4-thioxo-3,4-dihydro-5H-<1>benzopyrano<4,3-d>pyrimidine 
• 35832-40-7 1,3,5-tris(2-hydroxyphenyl)-2,4-diazapenta-1,4-diene 
• 128720-13-8 methyl 2-(2-amino-3-methoxycarbonyl-4H-1-benzopyran-4-yl)-2-cyanoethanoate 
• 57508-48-2 carbethoxyacetamidine hydrochloride 
• 1218-69-5 2-(2-hydroxyphenyl)-4H-benzo[e][1,3]oxazin-4-one 

Relevant academic research and scientific papers

Synthetic Reactions of Methyl 2-(2-Amino-3-methoxycarbonyl-4H-1-benzopyran-4-yl)-2-cyanoethanoate

The title ester characteristically undergoes reactions in which the original 4-substituent is displaced, affording a benzopyran fragment which undergoes addition to reactive compounds at either the 4- or the 2-position.Subsequent rearrangement leads to fo

Eine einfache Synthese von 5H-Benzopyranopyrimidin-Derivaten mit Oxo-, Thioxo- und/oder Imino-Funktionen in 4- und 5-Stellung

The reaction of 4-dicyanomethylene- or 4--2-(2-hydroxyphenyl)-4H-1,3-benzoxazine with ammonium acetate, hydrogen sulfide, or aqueous acid represents a useful method for the preparation of 4,5-(imino, thioxo, or oxo)-disubstituted 2-(2-hydroxyphenyl)-3,4-dihydro-5H-benzopyranopyrimidines.