tert-butyl 2,4-di-tert-butoxy-5-chloro-6-(1-methyl-1H-indol-5-yl)nicotinate 、
盐酸 、
1,4-二氧六环 以provided 5-chloro-4-hydroxy-6-(1-methyl-1H-indol-5-yl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid (12 mg, 68%)的产率得到5-chloro-4-hydroxy-6-(1-methyl-1H-indol-5-yl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid