丁基1-环己烯基硫醚 、
2-(ethylthio)propene 、
methyl (1R,2R,3S)-3-(ethylthio)-3-methyl-2-((2-oxo-1,3-oxazolidin-3-yl)carbonyl)cyclobutanecarboxylate 以(1R,2R,3R)-1-ethylthio-3-methoxycarbonyl-1-methyl-2-(oxazolidin-2-on-3-yl)carbonylcyclobutane (72:28, 70%) was obtained的产率得到methyl (1R,2R,3R)-3-(ethylthio)-3-methyl-2-((2-oxo-1,3-oxazolidin-3-yl)carbonyl)cyclobutanecarboxylate