Allylic Amination of Internal Alkynes with Aromatic and Aliphatic Amines Using Polymer-Supported Triphenylphosphane-Palladium Complex as a Heterogeneous and Recyclable Catalyst
作者:Yogesh S. Wagh、Pawan J. Tambade、Dinesh N. Sawant、Bhalchandra M. Bhanage
DOI:10.1002/ejoc.201000463
日期:2010.9
for the allylic amination of internalalkynes with amines by using a polymer-supported triphenylphosphane-palladium complex [PS-TPP-Pd] as a highly active heterogeneous reusable catalyst was developed. The catalyst exhibited remarkable activity and is reusable over five consecutive cycles. The protocol was applicable for a variety of hindered and functionalized aromatic/ aliphatic amines and afforded
Pd(OAc)2/dppf as an efficient and highly active catalyst for the allylation of amines, alcohols and carboxylic acids with 1-phenyl-1-propyne
作者:Yogesh S. Wagh、Dinesh N. Sawant、Pawan J. Tambade、Kishor P. Dhake、Bhalchandra M. Bhanage
DOI:10.1016/j.tet.2011.02.008
日期:2011.4
Pd(OAc)(2)/1,1'-bis(diphenylphosphino)ferrocene as an efficient, highly active catalyst for the allylation of amines, alcohols and carboxylic acids with 1-phenyl-1-propyne has been developed. The effect of various reaction parameters, such as ligand, time, solvent, temperature, metal: ligand ratio and catalyst concentration on yields of the product were investigated. The optimized procedure works well under mild operating conditions and permits rapid generation of a library for various allylated products. (C) 2011 Elsevier Ltd. All rights reserved.
Asymmetric Allylic Alkylation of β-Ketoesters via C–N Bond Cleavage of <i>N</i>-Allyl-<i>N</i>-methylaniline Derivatives Catalyzed by a Nickel–Diphosphine System
nickel-catalyzed AAA with allylicalcohols results in low enantioselectivity. On the basis of the kinetics using a catalyst system made of Ni(cod)2 and (S)-Tol-MeO-BIPHEP, and DFT calculations for the reaction pathway of the AAA reaction mediated by an isolated olefin-coordinated nickel–DPPF complex 4b, we propose a mechanism where protonation of the nitrogen atom of the coordinating allylic amine by β-ketoester