3-ethyl-7-hydroxymethylpyrido[2,3-b]pyrazin-2(1H)one 、 5-[(1R,6S)-2,5-diazabicyclo[4.2.0]octan-2-yl]-N-methylpyridine-2-carboxamide 在
(氰甲基)三甲基碘化铵 、
N,N-二异丙基乙胺 作用下,
以27 %的产率得到cis-5-(5-((3-ethyl-2-oxo-1,2-dihydropyrido[2,3-b]pyrazin-7-yl)methyl)-2,5-diazabicyclo[4.2.0]oct-2-yl)-N-methylpyridinecarboxamide