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Synthesis and spectral properties of 3-dimethylamino-6-X-7-Y-8-Z-2H-1-benzopyran-2-ones

P. Hrnčiar, A. Gáplovský, and J. Donovalová

Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University, CS-84215 Bratislava

 

Abstract: The reaction of salicylaldehyde, betaine, and acetic anhydride gives 3-dimethylamino-2//-l-benzopyran-2-one, in contrast with the published 2-dimethylamino-l,3-indandione. Substituted salicylaldehydes give in the same conditions 3-dimethylamino-6-X-7-Y-8-Z-2H-1 -benzopyran-2-ones. The structure of the prepared compounds was determined by IR, 1H NMR, 13C NMR, MS, and UV spectroscopy.

Full paper in Portable Document Format: 435a669.pdf

 

Chemical Papers 43 (5) 669–675 (1989)

Monday, October 25, 2021

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