Reaction of tetrahydro-β-carboline-3-carboxylic acids 4a-c with alkyl and phenyl isocyanates in acetone provide the corresponding 2,5-disubstituted 1,3-dioxo-6H-1,2,3,5,11,11a-hexahydroimidazo[1,5-b]-β-carbolines 2a-r.
四氢-β-咔啉-3-
羧酸4a-c与烷基和苯基
异氰酸酯在
丙酮中的反应提供相应的2,5-二取代的1,3-二氧代-6 H -1,2,3,5,11,11a -六氢
咪唑并[1,5 - b ]-β-咔啉2a-r。