Chemo-Selectivity of Group-VIII Metal Catalysts in Hydrogenation of Nonconjugated Enones
作者:Jun-ichi Ishiyama、Satoshi Maeda、Kazuhiro Takahashi、Yasuhisa Senda、Shin Imaizumi
DOI:10.1246/bcsj.60.1721
日期:1987.5
of group-VIII metal catalysts has been examined in the hydrogenation of nonconjugated enones at ambient temperature under an atmospheric pressure of hydrogen. A cobalt catalyst gave high yields of unsaturated alcohols from trialkylated olefinic ketones. Osmium showed the highest selectivity among platinum metal catalysts for the reduction of the carbonyl bond in the hydrogenation of trialkylated olefinic
VIII族金属催化剂的化学选择性已在常温氢气压力下非共轭烯酮的氢化中得到检验。钴催化剂从三烷基化烯烃酮中得到高收率的不饱和醇。在铂金属催化剂中,锇在三烷基化烯烃酮的加氢反应中对羰基键的还原显示出最高的选择性。无论催化剂如何,单烷基化和二烷基化烯烃酮的氢化通常以烯烃官能团的优先饱和进行。4-亚甲基-和4-亚乙基环己酮的氢化伴随着在乙醇溶剂中在钌、铑和钯黑催化剂上形成二乙缩醛。在其他烯酮的氢化和其他催化剂上未检测到缩醛。此外,还研究了镍和钴催化剂对无环烯酮加氢的化学选择性。