In the presence of (SCN)− mercuric chloride HgCl2 adds to acetylenic compounds R1CCR2 affording in most cases α-chloromercuri-β-thiocyanatoalkenes R1C(SCN)C(R2)HgCl and if R1 = R2 = Et or n-Bu isothiocyanates R1C(NCS)C(R2)HgCl. The action of halogens or thio compounds affords α-halo-β-thiocyanatoalkenes. Most of the reported reactions are regio- and stereo-specific, in particular both RC(SCN)CHBr
在(SCN)的存在下-
氯化
汞的HgCl 2添加到炔属化合物[R 1 CCR 2,得到在大多数情况下α
氯汞-β-thiocyanatoalkenes - [R 1 C(SCN)C(R 2)的HgCl及如果R 1= R 2= Et或n-Bu异
硫氰酸酯R 1 C(
NCS)= C(R 2)HgCl。卤素或
硫代化合物的作用提供了α-卤代-β-
硫氰酸根合烯烃。大多数报道的反应是区域特异性和立体特异性的,特别是RC(SCN)
CHBr和RCBrCHSCN都可以从1-
炔烃RCCH的区域特异性获得。还报道了1-
硫氰基-1-
炔烃的合成。