(R)-2-[2-amino-2-(3-methyl-1,2,4-oxadiazol-5-yl)-ethyl-sulfanyl-methyl]-3-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-5-methoxy-6-methyl-benzoic acid methyl ester 、
1,1′-硫代羰基二-2(1H)-吡啶酮 、
苯甲脒 在
ice 、 silica gel 作用下,
以
二氯甲烷 为溶剂,
反应 11.5h,
以v/v) as eluent to afford 480 mg of (R)-3-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-2-[2-[3-(imino-phenyl-methyl)-thioureido]-2-(3-methyl-1,2,4-oxadiazol-5-yl) -ethylsulfanylmethyl]-5-methoxy-6-methyl-benzoic acid methyl ester as a colorless oil的产率得到(R)-3-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-2-[2-[3-(imino-phenyl-methyl)-thioureido]-2-(3-methyl-1,2,4-oxadiazol-5-yl)-ethylsulfanylmethyl]-5-methoxy-6-methyl-benzoic acid methyl ester