ethyl 4-[[[[2-[[(2-methyl-5-oxazolyl)methyl]amino]-3-pyridinyl]amino]thioxomethyl]amino]-1-piperidinecarboxylate 、
N,N-二甲基甲酰胺 在
硫化氢 作用下,
以5.5 parts (38.2%)的产率得到ethyl 4-[[3-[(2-methyl-5-oxazolyl)methyl]-3H-imidazo[4,5-b]pyridin-2-yl]amino]-1-piperidine-carboxylate