tert-butyl (1-(2-(7-bromo-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)(2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)carbamate 、
2-(三正丁基锡基)噁唑 在
二(三叔丁基膦)钯 氮气 、 resultant residue 、 silica gel 、
氯仿 、
甲醇 作用下,
以
1,4-二氧六环 为溶剂,
反应 6.5h,
以methanol=98:2 to 95:5 to obtain 87 mg of tert-butyl (2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)(1-(2-(7-(1,3-oxazol-2-yl)-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate as a yellow oily substance的产率得到tert-butyl (2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)(1-(2-(7-(1,3-oxazol-2-yl)-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate