3-{(1S)-1-[(tert-butoxycarbonyl)amino]-2-hydroxyethyl}-5-(trifluoromethyl)benzoic acid 、
5-([-(7R)-7-amino-5,6,7,8-tetrahydronaphthalen-2-yl]oxy)-3,4-dihydro-1,8-naphthyridin-2(1H)-one 在
吡啶 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以48%的产率得到tert-butyl {(1S)-2-hydroxy-1-[3-[({(2R)-7-[(7-oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-4-yl)oxy]-1,2,3,4-tetrahydronaphthalen-2-yl}amino)carbonyl]-5-(trifluoromethyl)phenyl]ethyl}carbamate