中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-(4-methoxymethyl-2,6-dimethylphenyl)ethyl acetate | 79801-56-2 | C14H20O3 | 236.311 |
—— | 2-(3-bromo-4-methoxymethyl-2,6-dimethylphenyl)ethanol | 79801-57-3 | C12H17BrO2 | 273.17 |
—— | methyl 3-(2-hydroxyethyl)-6-methoxymethyl-2,4-dimethylbenzoate | 79801-58-4 | C14H20O4 | 252.31 |
—— | cybrodol methyl ether | 79801-65-3 | C16H24O3 | 264.365 |
—— | trisnorcybrodolide | 74973-61-8 | C12H14O3 | 206.241 |
—— | cybrodol | 75225-88-6 | C15H22O3 | 250.338 |
—— | isocybrodol | 75225-87-5 | C15H22O3 | 250.338 |
The total syntheses of cybrodol (1), isocybrodol (2), cybrodal (3), cybrodic acid (4), and trisnorcybrodolide (5), starting from 2-bromomesitylene (6) are described. The route involves oxidation of the 5-methyl group of 6 by means of chromyl acetate, addition of the β-hydroxyethyl chain by aryllithiation and reaction with ethylene oxide, and addition of the fifth carbon substituent by aryllithiation and treatment with ethyl chloroformate to give the key intermediate, methyl 3-(2-hydroxyethyl)-6-methoxymethyl-2,4-dimethylbenzoate (18d). The latter was transformed into trisnorcybrodolide (5), and further elaborated via the corresponding aldehyde 21 into the remaining cybrodins.