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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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