镧系元素芳氧化物Ln(OAr)3(THF)2(Ar = Ar 1 = 2,6- t Bu 2 -4-MeC 6 H 2,Ln = Yb(1),Y(2); Ar = Ar 2 = 2,6- i Pr 2 C 6 H 3,Ln = Y(3); Ar = Ar 3 = 2,6-Me 2 C 6 H 3,Ln = Y(4); Ar = Ar 1,Ln = Sm (5),钕(6))可以作为醛和酮的硼氢化反应的高效催化剂,具有良好的官能团耐受性和出色的化学选择性。进行了计算研究,以探索Ln-芳基氧化物催化醛/酮加氢硼化的可行机理。
Ytterbium-Catalyzed Hydroboration of Aldehydes and Ketones
作者:Weifan Wang、Xingchao Shen、Fengyi Zhao、Huan Jiang、Weiwei Yao、Sumod A. Pullarkat、Li Xu、Mengtao Ma
DOI:10.1021/acs.joc.7b02076
日期:2018.1.5
efficient catalyst for the hydroboration of a wide range of aldehydes and ketones with pinacolborane (HBpin) at room temperature. The protocol requires low catalyst loadings (0.1–0.5 mol %) and proceeds rapidly (>99% conversion in <10 min). Additionally, catalyst 1 shows a good functional group tolerance even toward the hydroxyl and amino moieties and displays chemoselective hydroboration of aldehydes over
Efficient and selective carbonyl hydroboration catalyzed by a lithium NCN-Pincer magnesiate complex [Li(THF) 4 ][NCN-MgBr 2 ]
作者:Man Luo、Jia Li、Qian Xiao、Shilong Yang、Fan Su、Mengtao Ma
DOI:10.1016/j.jorganchem.2018.04.040
日期:2018.8
The well-defined lithium NCN-Pincer magnesiate complex [Li (THF)4][NCN-MgBr2] 2 based on a bis(imino)aryl ligand has been successfully prepared, crystallographic characterized and employed as an efficient catalyst for hydroboration of a wide range of aldehydes and ketones with pinacolborane (HBpin) at room temperature. Both aldehyde and ketone hydroboration proceeded efficiently (>99% conversion in
Aluminum Monohydride Catalyzed Selective Hydroboration of Carbonyl Compounds
作者:Vineet Kumar Jakhar、Milan Kr. Barman、Sharanappa Nembenna
DOI:10.1021/acs.orglett.6b02310
日期:2016.9.16
The well-defined aluminum monohydride compound [(2,4,6-Me3-C6H2)NC(Me)}2(Me)(H)]AlH·(NMe2Et) (1) catalyzes hydroboration of a wide range of aldehydes and ketones under mild reaction conditions. Moreover, compound 1 displayed chemoselective hydroboration of aldehydes over ketones at rt.
定义明确的一氢化铝化合物[(2,4,6-Me 3 -C 6 H 2)NC(Me)} 2(Me)(H)] AlH·(NMe 2 Et)(1)催化氢硼化在温和的反应条件下可提供多种醛和酮。此外,化合物1在室温下显示出醛对酮的化学选择性氢硼化。
Catalytic regeneration of a Th–H bond from a Th–O bond through a mild and chemoselective carbonyl hydroboration
作者:Tapas Ghatak、Konstantin Makarov、Natalia Fridman、Moris S. Eisen
DOI:10.1039/c8cc05030a
日期:——
Here we present an unprecedented chemoselectivehydroboration for aldehydes and ketones catalysed by actinides. The reaction features a very low catalyst loading (0.1–0.004 mol%) and quantitative product formation in less than 15 minutes, at room temperature. Thermodynamic and kinetic studies including stoichiometric and labeling studies with deuterated pinacolborane allow us to propose a plausible