Direct Episulfidation of Alkenes and Allenes with Elemental Sulfur and Thiiranes as Sulfur Sources, Catalyzed by Molybdenum Oxo Complexes
作者:Waldemar Adam、Rainer M. Bargon、Wolfdieter A. Schenk
DOI:10.1021/ja029292p
日期:2003.4.1
4 and allenes 6, for which elemental sulfur, phenylthiirane, or methylthiirane have been employed as sulfur sources to afford the corresponding episulfides 5 and 7. The most effective catalytic episulfidation system to date is the combination of the dithiophosphate-ligated oxo complex 1b and phenylthiirane (Ibeta). This metathesis process is efficient enough to convert usually reluctant alkenes (cyclopentene
钼氧配合物 1a 和 1b 有效地催化硫转移到一系列烯烃 4 和丙二烯 6,其中元素硫、苯基硫杂环丙烷或甲基硫杂环丙烷已被用作硫源以提供相应的环硫化物 5 和 7。最有效的催化作用迄今为止,环硫化系统是二硫代磷酸酯连接的氧代复合物 1b 和苯基硫杂环戊烷 (Ibeta) 的组合。这种复分解过程足够有效,可以在温和的条件下以良好的收率将通常不受欢迎的烯烃(环戊烯、环庚烯、Z-环辛烯、Z-环壬烯、E-环癸烯、降冰片烯,甚至双环亚丙基)转化为它们的环硫化物。丙二烯(cyclonona-1,2-diene、cyclonona-1,2,5-triene、cyclodeca-1,2-diene 和 2,4-dimethylpenta-2,的直接催化硫化,