2,6-di-t-butyl-4-methoxyphenyl 4-methyl-2-pentenoate 、
tert-butyl 2-tert-butyl-4-methoxy-2,5-dihydro-1,3-imidazole-1-carboxylate 在
lithium diisopropyl amide 作用下,
以
四氢呋喃 为溶剂,
以68%的产率得到(2S,5S)-2-tert-Butyl-5-[1-(2,6-di-tert-butyl-4-methoxy-phenoxycarbonylmethyl)-2-methyl-propyl]-4-methoxy-2,5-dihydro-imidazole-1-carboxylic acid tert-butyl ester