An efficient, binaphthyl-backbone-stabilized palladium nanoparticles (Pd-BNP) catalyst for the 1,4-addition of aryl halides to enones has been developed. The scope of the reaction has been studied with various substituted and sterically hindered aryl halides and enones to afford the conjugate addition products in good to excellent yields. The catalyst has been recovered and reused up to five times without any appreciable change in particle size or reactivity. (Figure presented.). © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Govindasamy Sekar

Department Of Chemistry

Rajib Saha

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

Advanced Synthesis and Catalysis

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

Transition-metal nanoparticles (NPs) gained interest as a catalyst due to their high reactivity and recyclability. Monometallic NPs are less catalytic active compared to homogeneous counterparts as less number of catalytic active metal atoms are present on the surface of NPs and metal atoms present in the core part of the NPs are not utilized. It is necessary to synthesize a stable, reusable, highly reactive and economic catalyst which contain a more number of catalytic active precious metal atoms on the surface of NPs. Here in we have synthesized metal-carbon bond stabilized, alloy structured Pd/Cu bimetallic nanoparticles using binaphthyl moiety as a stabilizer (Pd/Cu-BNP). The enrichment of catalytically active precious Pd atoms over inexpensive Cu on the surface was observed with a narrow size distribution of the nanoparticles (average diameter 3 ± 0.5 nm). The Pd/Cu-BNP was used as an efficient and recyclable catalyst for the synthesis of polycyclic triazoles through domino alkyne insertion and C[sbnd]H bond functionalization reaction sequence. © 2019

Journal of Catalysis

Surface enriched palladium on palladium-copper bimetallic nanoparticles as catalyst for polycyclic triazoles synthesis

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.

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

Palladium nanoparticles (Pd-BNP) stabilized by a binaphthyl-backbone can be efficiently used for the chemoselective reduction of aldehydes in the presence of hydrogen at room temperature in water. The Pd-BNP catalyst is easily recovered and reused for five catalytic cycles. (Figure presented.). © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Journal	Data powered by TypesetAdvanced Synthesis and Catalysis
Publisher	Data powered by TypesetWiley-VCH Verlag
ISSN	16154150
Open Access	No