6-((1R,4r)-4-((1R,3s,5S)-8-(tert-butoxycarbonyl)-8-azabicyclo[3.2.1]octan-3-yloxy)cyclohexyloxy)nicotinic acid 、
二甲胺 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
甲醇 、
乙腈 为溶剂,
以48.5%的产率得到(1R,3s,5S)-tert-butyl 3-((1r,4R)-4-(5-(dimethylcarbamoyl)pyridin-2-yloxy)cyclohexyloxy)-8-azabicyclo[3.2.1]octane-8-carboxylate