methyl 2-[2-bromopropanoyl]-5-methylthiazole-4-carboxylate 、
2-(N-butoxycarbonyl-2,2,5-trimethyloxazolidinyl)-5-methylthiazole-4-thiocarboxamide 在
potassium hydrogencarbonate 作用下,
以
乙二醇二甲醚 为溶剂,
以65%的产率得到methyl 2-(2-{2-[2-(4S,5R)-(N-butoxycarbonyl-2,2,5-trimethyl(oxazolidin-4-yl)-5-methyl(thiazol-4-yl))-5-methyl(thiazol-4-yl)]}-5-methylthiazole)-4-carboxylate