我们介绍了在氢氧化钾和[Ir(2-PyCH 2(C 4 H 5 N 2))(COD)] OTf(1)或[Ir(2-PyCH 2 PBu 2 t)(COD)] OTf(2)。该方法以高收率和优异的官能团耐受性提供脂族和苄基羧酸盐。我们举例说明了该方法在各种伯醇中的应用,包括涉及杂环甚至是游离胺的伯醇。复杂2与醇反应以形成晶体学表征催化中间体[IRH(η 1,η 3 -C 8 ħ 12)(2-PyCH 2 P吨卜2)](2A)和物[Ir 2 ħ 3(CO)(2- PyCH 2 P t Bu 2){μ-(C 5 H 3 N)CH 2 P t Bu 2 }](2c)。反应性1和2的意外相似之处在此反应中,以及对几种铱中间体的合成研究,使我们能够形成催化剂活化机理的一般建议,该催化剂分别控制甘油和甲酸脱氢反应中1和2的不同反应性。此外,仔细分析氧化顺序中的有机中间体,可以使人们对蒂申科和坎尼扎罗反应在整个氧化反应中的作用有了新的认识。
Simple and Efficient Catalytic Reaction for the Selective Deuteration of Alcohols
作者:Eugene Khaskin、David Milstein
DOI:10.1021/cs400092p
日期:2013.3.1
A highly efficient system for the catalyticdeuteration of α and β CH bonds of primary and secondary alcohols has been developed. The deuterium source is D2O. Together with the low catalyst loadings and the simple experimental setup, the reaction has direct application to the synthesis of bioactive isotopologues and the direct synthesis of fully deuterated substrates, such as ethanol-d6. The current
Ruthenium Catalyzed Selective α- and α,β-Deuteration of Alcohols Using D<sub>2</sub>O
作者:Basujit Chatterjee、Chidambaram Gunanathan
DOI:10.1021/acs.orglett.5b02254
日期:2015.10.2
Highly selective ruthenium catalyzed alpha-deuteration of primary alcohols and alpha,beta-deuteration of secondary alcohols are achieved using deuterium oxide (D2O) as a source of deuterium and reaction solvent. Minimal loading of catalyst (Ru-macho), base ((KOBu)-Bu-t), and low temperature heating provided efficient selective deuteration of alcohols making the process practically attractive and environmentally benign. Mechanistic studies indicate the D-O(D/R) bond activations by metal-ligand cooperation and intermediacy of carbonyl compounds resulting from dehydrogenation of alcohols.