中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,4-二羟基-6-甲基苯甲酸 | orsellinic acid | 480-64-8 | C8H8O4 | 168.149 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-benzyloxy-3-chloro-6-hydroxy-2-methylbenzoic acid | 131524-45-3 | C15H13ClO4 | 292.719 |
—— | methyl 4-O-benzyl-2'-O-methyllecanorate | 219700-69-3 | C25H24O7 | 436.461 |
—— | methyl 2'-O-methyllecanorate | 124521-14-8 | C18H18O7 | 346.337 |
The unambiguous total synthesis of ten O-methyl and/or C-hydroxy derivatives of gyrophoric acid (1) has been achieved by using the condensation of an appropriately substituted benzoic acid and benzyl lecanorate (33) or benzyl 2-O-methyllecanorate (32) in the key step.
The new depsidone cyclographin (1) (methyl 2-chloro-4-formyl-3,7-dihydroxy-1,6,9-trimethyl-11-oxo-11H-dibenzo[ b,e ][1,4]dioxepin-8-carboxylate) has been isolated from the lichen Catarraphia dictyoplaca and the structure established by spectroscopic and degradative methods.