2,4-二溴丁酸甲酯 、 1-(2,2,2-trifluoroethyl)piperidin-4-amine 以yielded methyl 1-(1-(2,2,2-trifluoroethyl)piperidin-4-yl)azetidine-2-carboxylate as a light brown solid (8%)的产率得到methyl 1-(1-(2,2,2-trifluoroethyl)piperidin-4-yl)azetidine-2-carboxylate
The invention relates to a compound of formula (I)
wherein A
1
to A
3
and R
1
to R
3
are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament.