SYNTHESIS OF 8-HYDROXY-6-METHOXY- 3-UNDECYLISOCOUMARIN AND 2-HY DROXY - 4-METHOXY-6-(2-OXOTRIDECYL) BENZOIC ACID | ||
| Journal of Sciences, Islamic Republic of Iran | ||
| مقاله 4، دوره 6، شماره 1، 1995 اصل مقاله (226.01 K) | ||
| چکیده | ||
| Straightforward conversion of (+)-6,8-dimethoxy-3,4-dihydro-3- undecylisocoumarin (3) to the title isocoumarin was carried out. Hydrolytic ring opening of (3) afforded the hydroxy acid (4) which was immediately oxidized to keto acid (5) using chromic acid, Cyclodehydration of (5) afforded the 6,8- dimethoxy-3-undecylisocoumarin (6) which on selective demethylation of 8- methoxy group furnished the title isocoumarin (2). The title keto acid (1, R=H) which was obtained by hydrolytic ring opening of title isocoumarin (2) was esterified to keto ester (1, R=Me) | ||
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