中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl 2,4-dihydroxy-6-heptylbenzoate | 6121-77-3 | C15H22O4 | 266.337 |
—— | 2,2-dimethyl-5-(1-heptyl)-7-hydroxy-4H-1,3-benzodioxin-4-one | 137571-77-8 | C17H24O4 | 292.375 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | benzyl 2,4-bis(benzyloxy)-6-heptylbenzoate | 1408253-05-3 | C35H38O4 | 522.684 |
—— | benzyl hyperlatolate | 111699-62-8 | C34H42O7 | 562.703 |
—— | benzyl 4-(4'-benzyloxy-2'-methoxy-6'-pentylbenzoyloxy)-6-heptyl-2-hydroxybenzoate | 157067-55-5 | C41H48O7 | 652.828 |
—— | benzyl 4-((2,4-bis(benzyloxy)-6-heptylbenzoyl)oxy)-2-heptyl-6-hydroxybenzoate | 1408253-09-7 | C49H56O7 | 756.979 |
—— | benzyl 4-O-methylhyperolivetorate | 193617-67-3 | C36H44O8 | 604.741 |
—— | 2,4-bis(benzyloxy)-6-heptylbenzoic acid | 1408253-08-6 | C28H32O4 | 432.56 |
—— | sphaerophorin | 529-56-6 | C23H28O7 | 416.471 |
—— | 4-O-demethylsphaerophorin | —— | C22H26O7 | 402.444 |
—— | ascoclavulinic acid B | —— | C28H38O7 | 486.606 |
—— | 4-(4'-hydroxy-2'-methoxy-6'-pentylbenzoyloxy)-6-heptyl-2-hydroxybenzoic acid | 157067-59-9 | C27H36O7 | 472.579 |
—— | 4-(4'-hydroxy-2'-methoxy-6'-nonylbenzoyloxy)-6-heptyl-2-hydroxybenzoic acid | 157067-62-4 | C31H44O7 | 528.686 |
—— | benzyl 4-O-methylhyperolivetorate ethylene acetal | 193617-57-1 | C38H48O9 | 648.794 |
The unambiguous total synthesis of the lichen depsides 2-O-methylglomelliferic acid (39), 4-O- methylhyperolivetoric acid (40), hyperconfluentic acid (41), microphyllinic acid (42), arthoniaic acid (43), 2′-O-methylmicrophyllinic acid (44), 2′-O-methylhyperphyllinic acid B (45), 4-O-methylsuperolivetoric acid (46), 2′-O-methylhyperphyllinic acid A (47), 2′-O-methylnorsuperphyllinic acid (48) and 4-O- methyloxocryptochlorophaeic acid (49) has been achieved by the condensation of an appropriately substituted orsellinic acid and protected phenol in the key step, followed by deprotection.
Two new diphenyl ethers, 4-(2-carboxy-3-heptyl-5-methoxyphenoxy)-2-heptyl-6-hydroxybenzoic acid (micareic acid) (13), 4-(2-carboxy-3-heptyl-5-methoxyphenoxy)-2-heptyl-6-hydroxy-3-methoxybenzoic acid (methoxymicareic acid) (27) and a new depside, 4-(2-heptyl-6-hydroxy-4-methoxybenzoyloxy)- 2-heptyl-6-hydroxybenzoic acid (prasinic acid) (34) have been detected in chemical races of the lichen Micarea prasina Fr. and isolated and characterized as the corresponding methyl esters. The structure of the latter compounds has been confirmed by total synthesis. The key steps in the synthesis of the diphenyl ethers (14), (26) involved Ullmann-like condensation between the 3-chloro 2-enone (17) and the phenols (11), (31), and subsequent aromatization of the enol ethers (23) and (32). A biomimetic-type synthesis of methyl micareate (48) has also been achieved by treatment of the depside (33) with sodium hydride in dimethylformamide.