Nickel-Catalyzed Alkylation of Ketone Enolates: Synthesis of Monoselective Linear Ketones
作者:Jagadish Das、Mari Vellakkaran、Debasis Banerjee
DOI:10.1021/acs.joc.8b02609
日期:2019.1.18
Herein we have developed a Ni-catalyzed protocol for the synthesis of linear ketones. Aryl, alkyl, and heteroaryl ketones as well as alcohols yielded the monoselective ketones in up to 90% yield. The catalytic protocol was successfully applied in to a gram-scale synthesis. For a practical utility, applications of a steroid derivative, oleyl alcohol, and naproxen alcohol were employed. Preliminary catalytic
Use of a Cyclometalated Iridium(III) Complex Containing a N<sup>∧</sup>C<sup>∧</sup>N-Coordinating Terdentate Ligand as a Catalyst for the α-Alkylation of Ketones and <i>N</i>-Alkylation of Amines with Alcohols
作者:Pengcheng Liu、Ran Liang、Lei Lu、Zhentao Yu、Feng Li
DOI:10.1021/acs.joc.6b02758
日期:2017.2.17
A cyclometalated iridium(III) complexcontaining a N∧C∧N-coordinating terdentate ligand [Ir(dpyx-N,C,N)Cl(μ-Cl)]2 was found to be a general and highly effective catalyst for the α-alkylation of ketones and N-alkylation of amines with alcohols. In the presence of catalyst (1 mol % Ir) and base (0.2–0.5 equiv), a variety of desirable products were obtained in good yields under an air atmosphere. Notably
A new method for converting terminal epoxides and primary alcohols into α-alkylated ketones under borrowing hydrogen conditions is reported. The procedure involves a one-pot epoxide ring opening and alkylation via primary alcohols in the presence of an N-heterocyclic carbene iridium(I) catalyst, under aerobic conditions, with water as the side product.
α-alkylated ketones has been disclosed via the reaction of primary alcohols with secondary alcohols and ketones by using [IrCl(COD)(NHC)] complexes as a catalyst. Various α-alkylated ketones were obtained in high yields from the alkylation of alcohol with alcohol and ketone with alcohol through a borrowing hydrogen reaction by using 0.05–0.5 mol % iridium(I) and a catalytic amount of KOH (5–10 mol %)