Pseudohalogen Chemistry. III. Orientation of Heterolytic Addition of Thioeyanogen Chloride to Some Unsymmetrical Alkenes
作者:Robert G. Guy、Ian Pearson
DOI:10.1246/bcsj.49.2310
日期:1976.8
α-hydroxy-β-thiocyanates, vinylic thiocyanates or allylic isothiocyanates in various combinations. The additions to the α-arylalkenes are regiospecific, yielding the Markownikov-orientated products, but the regiospecificity of the additions to the aliphatic alkenes depends on the structure of the alkene. The orientation of addition is discussed in terms of open carbonium ions, e.g. 17, for the α-arylalkenes and cyano-sulfonium
硫氰氯化物与各种不对称烯烃、环烯烃和 α-芳基烯烃在自由基抑制剂的存在下,在 25 °C 的醋酸中,在黑暗中反应生成 α-氯-β-硫氰酸酯、α-乙酰氧基-β-硫氰酸酯、α -羟基-β-硫氰酸酯、乙烯基硫氰酸酯或烯丙基异硫氰酸酯的各种组合。α-芳基烯烃的加成是区域专一性的,产生 Markownikov 取向的产物,但脂肪族烯烃加成的区域专一性取决于烯烃的结构。对于α-芳基烯烃,根据开环碳正离子(例如17)和脂族烯烃的氰基锍离子(例如18)讨论加成方向。