6-(6-cyclopropylpyridin-3-yl)-1,2,3,4-tetrahydro-2,7-naphthyridine hydrochloride 、 ((S)-4-methyl-2,5-dioxoimidazolidin-4-yl)methanesulfonyl chloride 在
(5S)-5-({[6-(6-cyclopropylpyridin-3-yl)-3,4-dihydro-2,7-naphthyridin-2(1H)-yl]sulfonyl}methyl)-5-methylimidazolidine-2,4-dione 、
乙醇 作用下,
以
乙酸乙酯 、
甲醇乙酸乙酯 为溶剂,
以gave 0.019 g (7.0%) of the title compound as white solid的产率得到(5S)-5-({[6-(6-cyclopropylpyridin-3-yl)-3,4-dihydro-2,7-naphthyridin-2(1H)-yl]sulfonyl}methyl)-5-methylimidazolidine-2,4-dione