New Method of Synthesis of β-Haloalkyl Alkynyl Sulfides: Reaction of Alkynesulfenamides with Olefins in the Presence of Phosphoryl Halides
作者:E. K. Beloglazkina、M. A. Belova、N. S. Dubinina、I. A. Garkusha、A. K. Buryak、N. V. Zyk
DOI:10.1007/s11178-005-0276-x
日期:2005.7
Reactions of alkynelsufenamides with olefins (such as cyclohexene, norbornene, 1-hexene, 1-octene, allylbenzene, and styrene) in the presence of phosphoryl halides (POCl3, POBr3) afforded 70–95% of β-halo-substituted alkyl alkynyl sulfides. The reactions with cyclohexene and norbornene are characterized by trans stereoselectivity. Alkynylsulfenylation of terminal alkyl- and benzylacetylenes occurs in a regioselective fashion with predominant formation of the corresponding anti-Markownikoff adducts, while the addition to styrene yields halogen-containing sulfides according to the Markownikoff rule.
在磷卤化物(POCl3、POBr3)存在下,炔基磺酰胺与烯烃(如环己烯、降冰片烯、1-己烯、1-辛烯、烯丙基苯和苯乙烯)发生反应,可得到 70-95% 的 β-卤代烷基炔基硫化物。与环己烯和降冰片烯的反应具有反式立体选择性。末端烷基乙炔和苄基乙炔的炔基硫化反应具有区域选择性,主要形成相应的反马科尼科夫加合物,而与苯乙烯的加成反应则根据马科尼科夫规则生成含卤素的硫化物。