3-[(1-ethyl-2-methyl-3-indolyl)carbonyl]-4-pyridinecarboxylic acid 、 4-[(1-Ethyl-2-methyl-3-indolyl)carbonyl]-3-pyridinecarboxylic acid 、
二苯胺 以
吡啶 为溶剂,
以of acetic anhydride there was obtained 1-(1-ethyl-2-methyl-3-indolyl)-1-(diphenylamino)furo[3,4-c]pyridine-3(1H)-one as a viscous oil的产率得到乙酸酐