Copper(I)-Catalyzed Regio- and Stereoselective Intramolecular Alkylboration of Propargyl Ethers and Amines
作者:Hiroaki Iwamoto、Yu Ozawa、Koji Kubota、Hajime Ito
DOI:10.1021/acs.joc.7b02071
日期:2017.10.6
transformed into multisubstituted alkenes through stereospecific transformations. Mechanistic studies showed that the chemo- and stereoselectivity of copper(I)-catalyzed borylation depends on the type of leaving group. Density functional theory calculations suggested that the regioselectivity of the borylcupration of the alkyne is controlled by the electronic effect of the oxygen atom of the propargyl ether
Cobalt(II) Schiff's base complex catalysed oxidation of alcohols with dioxygen in the presence of ethyl 2-oxocyclopentanecarboxylate
作者:T. Punniyamurthy、Javed Iqbal
DOI:10.1016/s0040-4039(00)76726-8
日期:1994.6
Cobalt(II) Schiff's base complex 1 catalyses the oxidation of primary and secondary alcohols to aldehydes and ketones respectively, in the presence of dioxygen and ethyl 2-oxocyclopentanecarboxylate 2 at 60–70° C.
Double Gold-Catalysed Annulation of Indoles by Enynones
作者:Stephen J. Heffernan、James P. Tellam、Marine E. Queru、Andrew C. Silvanus、David Benito、Mary F. Mahon、Alan J. Hennessy、Benjamin I. Andrews、David R. Carbery
DOI:10.1002/adsc.201300018
日期:2013.4.15
The gold‐catalysed double functionalisation of indoles is presented. Enynones are used to annulate indoles via a double sodium tetrachloroaurate‐catalysed process involving a mixture of CH activation and alkyne activation modes of promotion. Good yields for the formation of medicinally relevant [6,5,7]‐tricyclic indoles are realised.
A versatile cobalt(II)-Schiff base catalyzed oxidation of organic substrates with dioxygen: Scope and mechanism
作者:T Punniyamurthy、Beena Bhatia、M.Madhava Reddy、Golak C Maikap、Javed Iqbal
DOI:10.1016/s0040-4020(97)00432-8
日期:1997.6
Cobalt(II) complex 1a-f derived from Schiff bases act as efficient catalysts during the oxidation of wide range of organicsubstrates(e.g. alkenes, alcohols, benzylic compounds and aliphatic hydrocarbons) with dioxygen in the presence of aliphatic aldehydes or ketones or ketoesters. EPR studies on 1a-f complexes suggest that the aliphatic carbonyl compounds promote the formation of a cobalt(III)-superoxo
Cobalt catalyzed regioselective allylation of 1,3-dicarbonyl compounds
作者:Golak C. Maikap、M. Madhava Reddy、Manoj Mukhopadhyay、Beena Bhatia、Javed Iqbal
DOI:10.1016/s0040-4020(01)85380-1
日期:1994.1
Catalytic amount of Cobalt(II) chloride in 1,2-dichloroethane promotes the allylation of 1,3-dicarbonyl compounds with allyl acetates in high yields. The allylation of pentane-2,4-dione is highly regioselective as compared with methylacetoacetate and ethyl 2-oxocyclopentanecarboxylate.