降冰片烯 、 三乙氧基硅烷 在
platinum(0)-imidazolyl schiff base complex immobilized in periodic mesoporous organosilica framework nanocatalyst 作用下,
反应 2.0h,
生成 2-triethoxysilanylnorbornane
参考文献:
名称:
固定在周期性介孔有机硅骨架中的铂-咪唑基席夫碱配合物作为氢化硅烷化催化剂
摘要:
在十六烷基三甲基溴化铵作为软模板的情况下,通过新制备的双(咪唑基)亚胺桥双硅烷与原硅酸四乙酯之间的共缩合反应合成了含咪唑基席夫碱的周期性中孔有机硅(PMO)。然后将所得的合成PMO用作铂催化剂的固体载体。该复合物通过多种技术进行了全面表征,包括FTIR,固态13 C NMR和29 Si-NMR光谱以及N 2吸附/解吸分析,X射线衍射(XRD),X射线光电子能谱(XPS),扫描电子显微镜(SEM)和透射电子显微镜(TEM)方法。此外,已证明该催化剂可有效介导烯烃与氢硅烷之间的氢化硅烷化反应,并且可以重复使用至少五个循环而不会显着降低活性。
5-heptanedionato)nickel(II) (1c) as versatile hydrosilylation catalyst precursors is described. Complexes 1a-c catalyze 1,4-selectivehydrosilylation of 1,3-dienes in the presence of NaBHEt3 at ambient temperature. The reactions exhibit good regioselectivity to give the branched isomers as major products. The catalytic system also catalyzes hydrosilylation of alkenes including industriary important siloxy-
Use of carboxylated polyethylene glycol as promoter for platinum-catalyzed hydrosilylation of alkenes
作者:Ying Bai、Jiajian Peng、Jiayun Li、Guoqiao Lai
DOI:10.1002/aoc.1776
日期:2011.5
Several carboxylatedpolyethyleneglycols as promoters were applied in the platinum‐catalyzed hydrosilylation of alkenes, and polyethyleneglycol maleic acid monoester as a promoter for hydrosilylation was investigated. It was found that an improvement of the selectivity was achieved in the presence of carboxylatedpolyethyleneglycol, and the β‐adduct as major product was obtained. Additionally, the