Selective Hydrogenation of Conjugated Dienes Catalyzed by Thiocyanatotris(triphenylphosphine)cobalt(I)
作者:Taisei Nakayama、Hiroyoshi Kanai
DOI:10.1246/bcsj.58.16
日期:1985.1
bromide, selectively hydrogenated conjugated dienes to the corresponding cis-monomenes. The C2-or/and C3-methyl substituted 1,3-butadienes enhance the reactivity by a factor of 2.3 per one methyl group, while C1- or/and C4-methyl substituted 1,3-butadienes lower the reactivity by a factor of 1/23 per one methyl group. In the hydrogenation of cyclic conjugated dienes α-angle (∠C–C=C) is closely related to
硫氰酸根合三(三苯基膦)钴(I)由双(硫氰酸根合)双(三苯基膦)钴(II)、三苯基膦、溴化锌、选择性氢化共轭二烯到相应的顺式单烯中原位制备。C2-或/和C3-甲基取代的1,3-丁二烯每一个甲基将反应性提高2.3倍,而C1-或/和C4-甲基取代的1,3-丁二烯则降低反应性每个甲基有 1/23。在环状共轭二烯的加氢中,α角(∠C-C=C)与加氢速率密切相关。环醚的加氢速率大于无环醚的加氢速率,但无环醚的顺式选择性要高得多。氘选择性地添加到 1,3-丁二烯和 2,5-降冰片二烯(双环 [2.2.1] 庚-2,5-二烯)中,得到 3,4-dideuterio-1-butene 和 cis-1,4-dideuterio-2-butene 和endo,endo-5,6-dideuteterionorbornene 和endo,endo-3,5-dideuterionortricyclene。提出了一种机制,该机制源自