A total synthesis of mycophenolic acid, some analogues and some biogenetic intermediates
作者:L. Canonica、B. Rindone、E. Santaniello、C. Scolastico
DOI:10.1016/s0040-4020(01)88962-6
日期:1972.1
Mycophenolic acid (28) has been obtained by a convergent synthesis starting from methyl 6-bromo-4-methylhex-4-enoate (13) and 5,7-dihydroxy-4-methylphthalide (24). For the total synthesis of 5,7-dihydroxy-4-methylphthalide, 1-carbethoxy-2,3-dimethylcyclohexa-4,6-dione (14) was aromatized and transformed into 4,6-dimethoxy-2,3-dimethylbenzamide. The photolysis of the corresponding N-chloroamide and
霉酚酸(28)是通过收敛合成从6-溴-4-甲基己基-4-烯酸甲酯(13)和5,7-二羟基-4-甲基邻苯二甲酸酯(24)开始获得的。为了全合成5,7-二羟基-4-甲基邻苯二甲酰亚胺,将1-碳乙氧基-2,3-二甲基环己-4,6-二酮(14)芳香化并转化为4,6-二甲氧基-2,3-二甲基苯甲酰胺。相应的N-氯酰胺的光解和随后的水解得到5,7-二甲氧基-4-甲基邻苯二甲酸酯,其被水解为5,7-二羟基-4-甲基邻苯二甲酸酯(24)。