Origin of Fast Catalysis in Allylic Amination Reactions Catalyzed by Pd–Ti Heterobimetallic Complexes
作者:Whitney K. Walker、Benjamin M. Kay、Scott A. Michaelis、Diana L. Anderson、Stacey J. Smith、Daniel H. Ess、David J. Michaelis
DOI:10.1021/jacs.5b02428
日期:2015.6.17
especially in the transition state. The turnover frequency of classic Pd π allylcomplexes was compared to that of 1 to determine the impact of P-Pd-P coordination angle and ligand electronic properties on catalysis. These experiments identified that cationic (PPh3)2Pd(η(3)-CH2C(CH3)CH2) catalyst 3 performs similarly to 1 for allylicaminations with diethylamine. However, computations and experiment reveal
with esters and ether derivatives of allyl alcohol (2a-c) and related allyl-substituted compounds (4a-e) is reported. Special attention is paid to solvent and salteffects on catalytic activities and kinetic profiles for the formation of allylamines. The results are discussed in terms of the influence of some reaction parameters (polarity, ion exchange processes, substrate) on the rate determining step
Activation of C–O and C–N Bonds in Allylic Alcohols and Amines by Palladium Complexes Promoted by CO<sub>2</sub>. Synthetic Applications to Allylation of Nucleophiles, Carbonylation, and Allylamine Disproportionation
作者:Masato Sakamoto、Isao Shimizu、Akio Yamamoto
DOI:10.1246/bcsj.69.1065
日期:1996.4
can be achieved by using allylicalcohols directly in the presence of palladium complexes and CO2. Direct carbonylation of allylicalcohols into unsaturated carboxylic acids can be catalyzed by palladium complexes under the pressure of CO and CO2. Disproportionation of diallylamine into triallylamine and allylamine is also catalyzed by palladium complexes in the presence of CO2. On the basis of studies
通过在 CO2 下进行反应,钯配合物催化的烯丙醇中 C-O 键的直接活化得到了加速。与二乙胺反应,在常压二氧化碳和常压下,在钯配合物存在下,烯丙醇可转化为N,N-二乙基烯丙胺。在钯配合物和 CO2 存在下,直接使用烯丙醇可以实现各种碳亲核试剂的烯丙基化,例如 β-酮酯和 β-二酮。在CO和CO2的压力下,钯配合物可以催化烯丙醇直接羰基化为不饱和羧酸。二烯丙胺歧化成三烯丙胺和烯丙胺也在 CO2 存在下由钯配合物催化。
Palladium-Catalyzed Double and Single Carbonylation of Aryl Halides and Allylic Compounds
作者:Akio Yamamoto
DOI:10.1246/bcsj.68.433
日期:1995.2
After a brief introduction summarizing the author’s previous work concerning the double carbonylation of aryl halides catalyzed by palladium complexes, newly found catalytic processes (1) for converting allylic formates and chlorides into β,γ-unsaturated acids and (2) the double carbonylation of allylic chlorides to β,γ-unsaturated α-keto amides are described. Mechanisms which reasonably account for the catalytic processes are proposed on the basis of studies concerning the properties of the organopalladium complexes.
Double-bond migration of allylicalcohols and allylic alkyl ethers was catalytically effected with trans-Mo(N2)2(dpe)2(dpe = Ph2PCH2CH2PPh2). Decarbonylation occurred simultaneously in the case of allyl alcohol. Diallyl ether and allyl phenol ether gave the fragmentation products presumably through initial oxidative addition of the allylO bond. Allylamine was converted to N-propylideneallylamine and