A naturally occurring isoquinolinone alkaloid marinamide and its methyl ester were synthesised from phthalic anhydride over eight steps in 46% and 52% overall yield. The key intermediate methyl 2-(1-benzyl-1H-pyrrole-2-carbonyl) benzoate was synthesised from the acid chloride of mono methyl phthalate and 1-benzyl-1H-pyrrole catalysed by Zinc oxide under solvent-free conditions at room temperature.
以邻苯二甲酸酐为原料,通过八个步骤合成了一种天然异喹啉酮生物碱马林酰胺及其甲酯,总收率分别为 46% 和 52%。关键中间体 2-(1-苄基-1H-吡咯-2-羰基)苯甲酸甲酯是在室温无溶剂条件下,由邻苯二甲酸单甲酯的酸氯化物和 1-苄基-1H-吡咯在氧化锌催化下合成的。