Tetrahedron

New photochemical approaches to the synthesis of chromones

M Alvaro, H Garcia, S Iborra, MA Miranda, J Primo

Index: Alvaro, Mercedes; Garcia, Hermenegildo; Iborra, Sara; Miranda, Miguel A.; Primo, Jaime Tetrahedron, 1987 , vol. 43, # 1 p. 143 - 148

Full Text: HTML

Citation Number: 23

Abstract

Irradiation of the p-methoxyphenyl and p-methylphenyl esters of 2-butynoic, propynoic, 3- (ethylenedioxy) butanoic, 3, 3-dimethoxypropanoic and 3-oxobutanoic acids (1–3) affords the corresponding photo-Fries products 4–6. Compound 5a is converted in part into the acetophenone 7a, by way of a Norrish type II photo-reaction, while compound 6a is reluctant to undergo this process, in spite of the fact that it also possess γ-carbonyl hydrogen atoms. ...

Amebacidal chromanones

[Wiley Journal of the American Chemical Society, 1951 , vol. 73, p. 4205,4207]

Photocyclization of enol acetates of o-acetoxyacetophenones to chromones

[Garcia, Hermenegildo; Martinez-Utrilla, Roberto; Miranda, Miguel Angel Tetrahedron Letters, 1981 , vol. 22, # 18 p. 1749 - 1750]

Photolysis of enol acetates and α??bromo derivatives of o??(acyloxy) acetophenones

[Garcia, Hermenegildo; Martinez-Utrilla, Roberto; Miranda, Miguel A. Liebigs Annalen der Chemie, 1985 , # 3 p. 589 - 598]