4-ethyl-3-oxobis[1,2]dithiolo[3,4:4',3'-e][1,4]thiazine-5-thione 、
1,8-双-马来酰亚胺三乙二醇 在
scandium tris(trifluoromethanesulfonate) 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以21%的产率得到(3aR,6aS)(Z/E)-2-(4-ethyl-3-oxo-6-thioxo-3H,4H-[1,2]-dithiolo[3,4-b][1,4]thiazin-5(6H)-ylidene)-5-(2-(2-(2-((3aR,6aS)-(E/Z)-2-(4-ethyl-3-oxo-6-thioxo-3H,4H-[1,2]dithiolo[3,4-b][1,4]-thiazin-5(6H)-ylidene)-4,6-dioxotetrahydro-5H-[1,3]dithiolo-[4,5-c]pyrrol-5-yl)ethoxy)ethoxy)ethyl)dihydro-4H-[1,3]-dithiolo[4,5-c]pyrrole-4,6(5H)-dione