中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | ethyl 4-benzyloxy-3-chloro-6-hydroxy-2-methylbenzoate | 131524-44-2 | C17H17ClO4 | 320.773 |
—— | 4-benzyloxy-3-chloro-6-hydroxy-2-methylbenzoic acid | 131524-45-3 | C15H13ClO4 | 292.719 |
—— | benzyl 3-chloro-2,4,6-trihydroxybenzoate | 131524-46-4 | C14H11ClO5 | 294.691 |
2-羟基-6-甲基-4-苯基甲氧基苯甲酸乙酯 | ethyl 4-benzyloxy-2-hydroxy-6-methylbenzoate | 39503-11-2 | C17H18O4 | 286.328 |
A new synthetic route to norlichexanthone (1,3,6-trihydroxy-8-methyl- 9H-xanthen-9-one) derivatives has been developed by using a Smiles rearrangement of an appropriately substituted depside in the key step. 2,4,7-Trichloronorlichexanthone (22) and 4,5,7- trichloronorlichexanthone (29) have been prepared by this method. The former xanthone (22) was shown to be a constituent of the lichens Lecanora sulphurata and L. flavo-pallescens and the latter (29) a constituent of Micarea austroternaria var. isabellina.