Synthesis of 5‐ and 5,8‐dimethoxy‐2‐methylchromones
作者:
C. Ramachandra Rao,
V. Venkateswarlu,
期刊:
Recueil des Travaux Chimiques des Pays‐Bas
(WILEY Available online 1956)
卷期:
Volume 75,
issue 11
页码: 1321-1326
ISSN:0165-0513
年代: 1956
DOI:10.1002/recl.19560751113
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractA new method of synthesis of some derivatives of 2‐methylchromone with possible physiological activity similar to kellin and visnagin but not containing the furan ring has been reported. Starting from 2‐hydroxy‐6‐methoxy‐acetophenone, 5‐methoxy‐2‐methylchromone has been obtained by way of the intermediate, 2‐hydroxy‐6‐methoxy‐ω‐acetylacetophenone. By alkaline persulphate oxidation, 5‐hydroxy‐2‐methylchromone is converted into 5,8‐dihydroxy‐2‐methylchromone. Its acetate, partial and complete methyl ethers have been obtained. Demethylation of 5,8‐dimethoxy‐2‐methylchromone gave the isomeric 5,6‐dihydroxy‐2‐methylchromone, the constitution of w
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