2-(4-methoxyphenyl)-5-methylpyrrolidine 、 (R)-2-(5-(3-methylureido)-2',4'-dioxo-2,3-dihydrospiro[indene-1,5'-oxazolidin]-3'-yl)acetic acid 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以73%的产率得到1-[(1R)-4'-{2-[2-(4-methoxyphenyl)-5-methylpyrrolidin-1-yl]-2-oxoethyl}-3',5'-dioxo-2,3-dihydrospiro[indene-1,2'-[1,4]oxazolidin]-5-yl]-3-methylurea