(S)-3-borono-5-((1-cyclohexyl-2-(methylamino)-2-oxoethyl)carbamoyl)benzenaminium chloride 、
2-hydroxy-5-methyl-4-oxo-3H,4H-pyrido[2,3-d]pyrimidine-7-carboxylic acid 在
N,N,N',N'-tetramethylchloroformamidinium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N-甲基吡咯烷酮 为溶剂,
生成 (S)-(3-((1-cyclohexyl-2-(methylamino)-2-oxoethyl)carbamoyl)-5-(5-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-7-carboxamido)phenyl)boronic acid