The pot, atom, and step-economic synthesis of Rosettacin topo-I poison and its derivatives has been achieved using a novel domino N-amidoacylation/aldol-typecondensation, followed by decarboxylation of the ester function. The key domino procedure simply involves mixing HOBt ester as new reagent with lactam and NaH together in THF or THF/ DMF. The reaction seems to be general and led to suitable N-heterocyclic
A palladium-catalyzed cyclization–carbonylation of 2-alkynylprimarybenzamides 1 afforded methyl 3-substituted 1-methoxyisoquinoline-4-carboxylates 6 in good to moderate yields. In the case of mesylate 1r, 12 was obtained directly via a cyclization–carbonylation–cyclization cascade. Compounds 6 were converted to isoquinolin-1(2H)-ones 8 in good yields under microwave irradiation. In the case of the
钯催化的 2-炔基伯苯甲酰胺1的环化-羰基化反应以良好至中等的收率得到 3-取代的 1-甲氧基异喹啉-4-羧酸甲酯6 。就甲磺酸酯1r而言, 12是通过环化-羰基化-环化级联直接获得的。在微波辐射下,化合物6以良好的产率转化为异喹啉-1(2 H )-酮8 。在甲磺酸酯6q的情况下,以良好的产率获得三环异喹啉酮10 。噻吩-2-甲酰胺衍生物的反应也进展顺利。