2-amino-1-(4-(octyloxy)-3-(trifluoromethyl)phenyl)ethanone hydrochloride 、 (R)-3-(tert-butoxycarbonyl)-2,2,4-trimethyloxazolidine-4-carboxylic acid 在
O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate 作用下,
以provided phenol 6 in good yield的产率得到(R)-tert-butyl 2,2,4-trimethyl-4-(2-(4-(octyloxy)-3-(trifluoromethyl)phenyl)-2-oxoethylcarbamoyl)oxazolidine-3-carboxylate