4-hydroxy-5-methyl-6-oxo-5,6-dihydro-1,5-naphthyridine-3-carbonitrile 、
[trans-4-({[(1,1-dimethylethyl)oxy]carbonyl}amino)cyclohexyl]methyl ethanesulfonate 在
sodium hydride 作用下,
以
N,N-二甲基甲酰胺 、 mineral oil 为溶剂,
生成 1,1-dimethylethyl (trans-4-{[(3-cyano-5-methyl-6-oxo-5,6-dihydro-1,5-naphthyridin-4-yl)oxy]methyl}cyclohexyl)carbamate