Benzopyrans. 17. Triethylamine-mediated transformation of 4-oxo-4H-[1] benzopyran-3-carboxaldehyde

CK Ghosh, C Bandyopadhyay…

Index: Ghosh, Chandra Kanta; Bandyopadhyay, Chandrakanta; Tewari, Nimai Journal of Organic Chemistry, 1984 , vol. 49, # 15 p. 2812 - 2815

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Citation Number: 10

Abstract

H/Me b 10 (162) l (158) Me/Et 8 (200) 6 (196) OMe/Me 15 (180) Cl/Me 30 (116) Br/Me 24 (108) 6 (210) 75 (280)'Br/Et 56 (210) 80 (306)'N02/Me 22 (142) a Only 3a could be isolated in 2% yield by column chromatography, 3b, c being detected by TLC; all the chromones 3 are known compounds (see ref 3 and references cited therein). Each of the products 8 obtained in 2-3% yield decomposed above 300 OC. Obtained by acidcatalyzed ...

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