2-氯-3,6-二氟苯酚 、
(1R*,5S*)-7-(6-((S)-3-hydroxypyrrolidin-1-yl)pyridin-3-yl)-3,9-diazabicyclo[3.3.1]non-6-ene-3,6,9-tricarboxylic acid 3,9-di-tert-butyl ester 6-ethyl ester 在
三丁基膦 、
1,1'-azodicarbonyl-dipiperidine 作用下,
以
甲苯 为溶剂,
反应 2.0h,
生成 (1R,5S)-7-(6-((R)-3-(2-chloro-3,6-difluorophenoxy)pyrrolidin-1-yl)pyridin-3-yl)-3,9-diazabicyclo[3.3.1]non-6-ene-3,6,9-tricarboxylic acid 3,9-di-tert-butyl ester 6-ethyl ester 、 (1S,5R)-7-(6-((R)-3-(2-chloro-3,6-difluorophenoxy)pyrrolidin-1-yl)pyridin-3-yl)-3,9-diazabicyclo[3.3.1]non-6-ene-3,6,9-tricarboxylic acid 3,9-di-tert-butyl ester 6-ethyl ester