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Showing papers on "Benzopyrans published in 1972"

Patent•
Basic carbonates and carbamates of benzopyrans

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Lee Cheuk M1•
Abbott Laboratories1
25 May 1972
TL;DR: In this paper, the basic carbonates and carbamates of benzopyrans represented by the formula are represented as the formula, where n is 1 or 2, n is O or NH, y is an integer from 2-6, and R4 and R5 each are hydrogen or loweralkyl.
Abstract: WHEREIN N IS 1 OR 2; R1 is hydrogen or loweralkyl; R2 is loweralkyl; R3 is alkyl or cycloalkyl; X is O or NH; y is an integer from 2-6; and R4 and R5 each are hydrogen or loweralkyl; or R4 and R5 taken together form a 5- or 6-membered heterocyclic ring and the acid addition salts thereof. Basic carbonates and carbamates of benzopyrans represented by the formula

7 citations

Journal Article•DOI•
Research into analogs of pyran and related compounds: XXIX. The reaction of 4,4-dichlorochromenes (4,4-dichloro-4H-1-benzopyrans) with derivatives of cyanoacetic acid

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V. A. Zagorevskii, I. D. Tsvetkova, E. K. Orlova, S. L. Portnova
01 Jan 1972-Chemistry of Heterocyclic Compounds

3 citations

Journal Article•DOI•
Reaction of enamines with benzylidene ketones. Part II.

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J. W. Lewis, Peter Myers, J. A. Ormerod, I. A. Selby
01 Jan 1972-Journal of The Chemical Society-perkin Transactions 1
TL;DR: The reaction between cyclohexanone enamines and a variety of benzylidene ketones gives a dihydropyran derivative in each case as discussed by the authors, which on heating readily rearranges into isomeric enamino-ketones.
Abstract: The reaction between cyclohexanone enamines and a variety of benzylidene ketones gives a dihydropyran derivative in each case. The benzopyrans from reactions of 1 -piperidinocyclohexene with chalcone and with dibenzylideneacetone are unstable and on heating readily rearrange into isomeric enamino-ketones (6) and (10). Recyclisation of 2-phenyl-2-(2-piperidinocyclohex-2-enyl)ethyl styryl ketone (10) gives 1,4-diphenyl-7b-piperidinoperhydrocyclobuta[de]naphthalen-2-one (11).

1 citations