(4aRS,4bRS,8aSR,9aSR)-9-(Diethoxymethylen)-4b,8a,9,9a-tetrahydro-2,3,6,7-tetrakis(methylthio)-4aH-cyclopentabis<1,4>dithiin 以
乙醚 、
二氯甲烷 为溶剂,
以55%的产率得到(4aRS,4bRS,8aSR,9aSR)-4b,8a,9,9a-Tetrahydro-2,3,6,7-tetrakis(methylthio)-4aH-cyclopentabis<1,4>dithiin-9-carbonsaeure-ethylester