70458-56-9

Upstream product

• 71711-37-0 1-(3-hydroxy-1-phenyl-indol-2-yl)-ethanone 
• 71711-34-7 1-(3-hydroxy-1-phenyl-indol-2-yl)-2-methanesulfonyl-ethanone 
• 95-92-1 oxalic acid diethyl ester 

Downstream Products

• 71054-79-0 4,5-Dihydro-4-oxo-5-phenylpyrano[3,2-b]indole-2-carboxylic acid 
• 70458-62-7 5-Phenyl-2(1H-tetrazol-5-yl)pyrano[3,2-b]indol-4(5H)-one 
• 70458-60-5 4,5-dihydro-4-oxo-5-phenylpyrano[3,2-b]indole-2-carbonitrile 
• 70458-57-0 4,5-dihydro-4-oxo-5-phenylpyrano[3,2-b]indole-2-carboxamide 

Relevant academic research and scientific papers

Indolopyrones having anti-allergic activity

This invention relates to novel substituted indolopyrones which have utility in preventing allergic and asthmatic reactions in mammals.

Synthesis and antiallergy activity of 4-oxopyrano[3,2-b]indoles

A series of 4-oxopyrano[3,2-b]indole carboxylic acids, tetrazoles, and carboxamidotetrazoles has been prepared and tested for antiallergy potential in the rat passive cutaneous anaphylaxis (PCA) assay. Many of the compounds showed activity comparable or s