Synthesis of 3-arylisocoumarins, including thunberginols A and B, unsymmetrical 3,4-disubstituted isocoumarins, and 3-ylidenephthalides via iodolactonization of methyl 2-ynylbenzoates or the corresponding carboxylic acids
作者:Renzo Rossi、Adriano Carpita、Fabio Bellina、Paolo Stabile、Luisa Mannina
DOI:10.1016/s0040-4020(03)00212-6
日期:2003.3
carboxylic acids, were used as precursors either to 3-arylisocoumarins, including naturally-occurring thunberginols A and B, or to unsymmetrical 3,4-disubstituted isocoumarins. On the other hand, (Z)- and (E)-3-iodomethylidenephthalides, which were regioselectively prepared by iodolactonization of methyl 2-ethynylbenzoate, were employed as starting materials for the stereospecific synthesis of (Z)- and
3-芳基-4-碘异香豆素很容易通过2-甲基基苯甲酸甲酯或相应的羧酸的区域选择性碘内酯化而有效地制备,用作3-芳基异香豆素的前体,包括天然存在的类紫杉醇A和B,或不对称的。 3,4-二取代的异香豆素。另一方面,通过(2-)乙炔基苯甲酸甲酯的碘内酯化区域选择性制备的(Z)-和(E)-3-碘亚甲基萘被用作(Z)-和(E)的立体有择合成的原料。)-3-亚萘基。一些3-芳基异香豆素和不对称的3,4-二取代异香豆素在体外对人癌细胞具有一定的细胞毒活性。