Chiral nanoparticles have become one of the most versatile catalyst for the effective construction of chiral organic moieties. Recently, bimetallic nanoparticles as catalysts have gained interest among the chemists. The presence of hetero metal–metal interactions has modified the surface of the catalyst both electronically and geometrically to show unique activities, selectivities and possess an improved stability than the corresponding monometallic catalyst. In this review, the newly emerging bimetallic chiral nanoparticle catalysts (Rh/Co, Cu/Fe, Pd/Fe, Pt/Fe, Pd/Au, Rh/Ag, etc.) and their application in asymmetric Pauson–Khand reactions, hydrosilylation, Suzuki–Miyaura coupling, α-arylation of tetralones, reduction of ketones, allylation of nitrobenzaldehyde, 1,4-additon reactions and arylation of aldimines have been discussed. © 2016 Elsevier Ltd

Govindasamy Sekar

Department Of Chemistry

Rajib Saha

acetophenone

ALDIMINE DERIVATIVE

ALLYLTRIBUTYLTIN

amide

benzaldehyde

boronic acid derivative

carbene

carbon

CINCHONIDINE

Cobalt

Copper

ester

Gold

imine

Iron

ketone

Metal

nanoparticle

NITROBENZALDEHYDE

Palladium

PALLADIUM NANOPARTICLE

Platinum

polymer

Rhodium

Silane

Silver

tetralin derivative

unclassified drug

Allylation

arylation

asymmetric synthesis

catalyst

Hydrogenation

Hydrolysis

Hydrosilylation

nanocatalyst

oxidation

PAUSON KHAND REACTION

review

Sonogashira reaction

Suzuki reaction

synthesis

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Tetrahedron Letters

An efficient methodology for the selective and controlled oxidation of petroleum waste methylarenes/alkylarenes to aromatic carboxylic acids/ketone using easily recoverable and recyclable binaphthyl stabilized Pt nanoparticles (Pt-BNP) as a catalyst has been developed. The greener oxidant aq. tert-butyl hydroperoxide (TBHP) and green solvent water have been utilized in this oxidation reaction. The methodology is well tolerated with different functional groups. The less reactive electron deficient toluenes are also oxidized by Pt-BNP and gave a good yield of corresponding carboxylic acids with a high turnover number (TON) 738-1448. The Pt-BNP catalyst was recovered and reused up to five catalytic cycles. The heterogeneous test suggested that the reaction is catalyzed by heterogeneous Pt-BNP catalysts. Based on control experiments and literature reports, a possible reaction mechanism has been proposed. © 2019 Elsevier B.V.

Applied Catalysis B: Environmental

Selective oxidation of alkylarenes to aromatic acids/ketone in water by using reusable binaphthyl stabilized Pt nanoparticles (Pt-BNP) as catalyst

An efficient, reusable and stable binaphthyl stabilized Pd-nanoparticles (Pd-BNP) catalyzed the direct ortho-C−H hydroxylation of acetophenone oxime ethers under neutral and phosphine ligand-free condition has been developed. A readily available, economic, safe and greener oxidant oxone has been used in this direct ortho-hydroxylation. The scope of the reaction has been studied with various acetophenone oxime ethers including electron rich to electron deficient system and the reaction afforded only mono hydroxylated products in a highly regioselective manner. Several control experiment results confirmed that the oxone is the hydroxyl source. The Pd-BNP catalyst has been reused up to five times. The heterogeneous test confirmed that the reaction is catalyzed by the heterogeneous Pd-BNP catalyst. (Figure presented.). © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Advanced Synthesis and Catalysis

Reusable Palladium Nanoparticles Catalyzed Oxime Ether Directed Mono Ortho-Hydroxylation under Phosphine Free Neutral Condition

Binaphthyl stabilized palladium nanoparticles (Pd-BNP) catalyzed synthesis of biologically active phenanthridinones via domino C–H activation followed by C–C and C–N bond formation strategy in open air conditions is disclosed. This method works well with a broad range of N-methoxybenzamides and aryliodides substrates with different functional groups. The reaction is catalyzed by 1.5 mol% of heterogeneous Pd-BNP catalyst and afforded the phenanthridinones up to 87% yield with exclusive regioselectivity. Hot centrifuge test, UV spectroscopy analysis and Hg poisoning test are proved the heterogeneous nature of Pd-BNP catalyst. © 2018 Elsevier Inc.

Journal of Catalysis

Stable Pd-nanoparticles catalyzed domino C–H activation/C–N bond formation strategy: An access to phenanthridinones

ACS Sustainable Chemistry & Engineering

Surfactant-Aided Chiral Palladium(II) Catalysis Exerted Exclusively in Water for the C–H Functionalization of Indoles

Angewandte Chemie International Edition

Chiral Nanoparticles/Lewis Acids as Cooperative Catalysts for Asymmetric 1,4‐Addition of Arylboronic Acids to α,β‐Unsaturated Amides

Organic Letters

Asymmetric Arylation of Imines Catalyzed by Heterogeneous Chiral Rhodium Nanoparticles

Advances in Colloid and Interface Science

Noble metal-based bimetallic nanoparticles: the effect of the structure on the optical, catalytic and photocatalytic properties

Energy & Environmental Science

Ni-based bimetallic heterogeneous catalysts for energy and environmental applications

Bimetallic chiral nanoparticles as catalysts for asymmetric synthesis

Journal	Data powered by TypesetTetrahedron Letters
Publisher	Data powered by TypesetElsevier Ltd
ISSN	00404039
Open Access	No