2,4-二溴丁酸甲酯 、 4-氨基-2,2-二甲基四氢吡喃 以yielded methyl 1-(2,2-dimethyltetrahydro-2H-pyran-4-yl)azetidine-2-carboxylate as a light brown solid (33%)的产率得到methyl 1-(2,2-dimethyltetrahydro-2H-pyran-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.