Langer, Peter; Appel, Bettina published an article in Tetrahedron Letters. The title of the article was 《Efficient synthesis of benzopyrano[2,3-b]pyridines by sequential reactions of 1,3-bis-silyl enol ethers with 3-cyanobenzopyrylium triflates》.Recommanded Product: 50743-32-3 The author mentioned the following in the article:
Benzopyrano[2,3-b]pyridines were efficiently prepared by condensation of 1,3-bis-silyl enol ethers with 3-cyanobenzopyrylium triflates and subsequent domino retro-Michael-lactonization-aldol reactions. For example, 2-ethoxycarbonylmethyl-5-oxo-5H-benzopyrano[2,3-b]pyridine was prepared in 46% yield from 3-cyano-4-benzopyranone and 1,3-bis(trimethylsilyloxy)-1,3-butadiene.6-Isopropyl-4-oxo-4H-chromene-3-carbonitrile(cas: 50743-32-3Recommanded Product: 50743-32-3) was used in this study.
6-Isopropyl-4-oxo-4H-chromene-3-carbonitrile(cas: 50743-32-3) belongs to nitriles. Nitriles are found in many useful compounds. Nitrile rubber is also widely used as automotive and other seals since it is resistant to fuels and oils. Organic compounds containing multiple nitrile groups are known as cyanocarbons.Recommanded Product: 50743-32-3
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts