(2R)-2-tert-butoxycarbonylamino-3-hydroxy-2-methylpropionic acid 2-(4-octyl-phenyl)-2-oxo-ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 ammonium acetate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
5,5-dimethyl-1,3-cyclohexadiene                                                                                  为溶剂,
                                                                                                                                                                                        以183 mg的产率得到(2S)-{2-hydroxy-1-methyl-1-[5-(4-octyl-phenyl)-1H-imidazol-2-yl]-ethyl}-carbamic acid tert-butyl ester