A smart catalyst system for the valorization of renewable furfural in aliphatic alcohols

2016 ◽  
Vol 6 (4) ◽  
pp. 1214-1221 ◽  
Author(s):  
Zonghui Liu ◽  
Xinli Tong ◽  
Jinbiao Liu ◽  
Song Xue
Keyword(s):  
Catalyst System ◽  
Aliphatic Alcohols ◽  
Hydrogenation Process ◽  
Pt Catalysts ◽  
Oxidative Condensation ◽  
One Pot ◽  
Highly Efficient ◽  
Supported Pt Catalysts

A highly efficient and selective oxidative condensation–hydrogenation process of renewable furfural with aliphatic alcohols mediated by supported Pt catalysts in a one-pot reactor is developed.

scholarly journals Pseudo five-component synthesis of 2,5-di(hetero)arylthiophenes via a one-pot Sonogashira–Glaser cyclization sequence

2011 ◽  
Vol 7 ◽  
pp. 1499-1503 ◽  
Author(s):  
Dominik Urselmann ◽  
Dragutin Antovic ◽  
Thomas J J Müller
Keyword(s):  
Materials Science ◽  
Catalyst System ◽  
Direct Access ◽  
One Pot ◽  
Highly Efficient ◽  
Cu Catalyst ◽  
Efficient Route ◽  
Glaser Coupling

Based upon a consecutive one-pot Sonogashira–Glaser coupling–cyclization sequence a variety of 2,5-di(hetero)arylthiophenes were synthesized in moderate to good yields. A single Pd/Cu-catalyst system, without further catalyst addition, and easily available, stable starting materials were used, resulting in a concise and highly efficient route for the synthesis of the title compounds. This novel pseudo five-component synthesis starting from iodo(hetero)arenes is particularly suitable as a direct access to well-defined thiophene oligomers, which are of peculiar interest in materials science.

Pd-PEPPSI-IPentCl: a new highly efficient ligand-free and recyclable catalyst system for the synthesis of 2-substituted indoles via domino copper-free Sonogashira coupling/cyclization

2017 ◽  
Vol 41 (16) ◽  
pp. 8187-8195 ◽  
Author(s):  
Murali Krishna Kolli ◽  
Nagul Meera Shaik ◽  
Govindasamy Chandrasekar ◽  
Sridhar Chidara ◽  
Raghu Babu Korupolu
Keyword(s):  
Copper Catalyst ◽  
Catalyst System ◽  
Recyclable Catalyst ◽  
Sonogashira Coupling ◽  
One Pot ◽  
Highly Efficient ◽  
One Pot Synthesis ◽  
Intermolecular Cyclization ◽  
Ligand Free

One pot synthesis of 2-substituted indolesviaSonogashira coupling (without a copper catalyst) followed by intermolecular cyclization using Pd-PEPPSI-IPentCl.

scholarly journals Highly durable carbon-supported Pt catalysts prepared by hydrosilane-assisted nanoparticle deposition and surface functionalization

2015 ◽  
Vol 51 (27) ◽  
pp. 5883-5886 ◽  
Author(s):  
Akinori Saito ◽  
Hiromi Tsuji ◽  
Iwao Shimoyama ◽  
Ken-ichi Shimizu ◽  
Yuta Nishina
Keyword(s):  
Surface Functionalization ◽  
Pt Nanoparticles ◽  
Carbon Support ◽  
Pt Catalysts ◽  
Support Material ◽  
One Pot ◽  
Nanoparticle Deposition ◽  
Supported Pt Catalysts

Hydrosilane enabled the formation of Pt nanoparticles and the silane functionalization of a carbon support material in one pot.

Green and Highly Efficient One-Pot Synthesis of Some New Bis Thiazolidinones

2013 ◽  
Vol 10 (10) ◽  
pp. 764-769 ◽  
Author(s):  
Akbar Mobinikhaledi ◽  
Alireza Amiri
Keyword(s):  
One Pot ◽  
Highly Efficient ◽  
One Pot Synthesis

Iodine Catalyzed Highly Efficient One Pot Three Component Synthesis of 4-arylidene-3-methylisoxazol-5 (4H) -one in Aqueous Medium

2018 ◽  
Vol 5 (2) ◽  
pp. 122-128 ◽  
Author(s):  
Srinivas L. Nakkalwar ◽  
Shivaji B. Patwari ◽  
Mohasim M. Patel ◽  
Vivekanand B. Jadhav
Keyword(s):  
Aqueous Medium ◽  
One Pot ◽  
Highly Efficient

scholarly journals Highly Efficient MOF Catalyst Systems for CO2 Conversion to Bis-Cyclic Carbonates as Building Blocks for NIPHUs (Non-Isocyanate Polyhydroxyurethanes) Synthesis

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 628
Author(s):  
Adolfo Benedito ◽  
Eider Acarreta ◽  
Enrique Giménez
Keyword(s):  
Molar Mass ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Catalyst System ◽  
Cyclic Carbonate ◽  
Ammonium Bromide ◽  
Cyclic Carbonates ◽  
High Molar Mass ◽  
Highly Efficient ◽  
Free Process

The present paper describes a greener sustainable route toward the synthesis of NIPHUs. We report a highly efficient solvent-free process to produce [4,4′-bi(1,3-dioxolane)]-2,2′-dione (BDC), involving CO2, as renewable feedstock, and bis-epoxide (1,3-butadiendiepoxide) using only metal–organic frameworks (MOFs) as catalysts and cetyltrimethyl-ammonium bromide (CTAB) as a co-catalyst. This synthetic procedure is evaluated in the context of reducing global emissions of waste CO2 and converting CO2 into useful chemical feedstocks. The reaction was carried out in a pressurized reactor at pressures of 30 bars and controlled temperatures of around 120–130 °C. This study examines how reaction parameters such as catalyst used, temperature, or reaction time can influence the molar mass, yield, or reactivity of BDC. High BDC reactivity is essential for producing high molar mass linear non-isocyanate polyhydroxyurethane (NIPHU) via melt-phase polyaddition with aliphatic diamines. The optimized Al-OH-fumarate catalyst system described in this paper exhibited a 78% GC-MS conversion for the desired cyclic carbonates, in the absence of a solvent and a 50 wt % chemically fixed CO2. The cycloaddition reaction could also be carried out in the absence of CTAB, although lower cyclic carbonate yields were observed.

scholarly journals Influence of the Reduction Temperature and the Nature of the Support on the Performance of Zirconia and Alumina-Supported Pt Catalysts for n-Dodecane Hydroisomerization

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 88
Author(s):  
Diana García-Pérez ◽  
Maria Consuelo Alvarez-Galvan ◽  
Jose M. Campos-Martin ◽  
Jose L. G. Fierro
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Major Influence ◽  
Pt Catalysts ◽  
Reduction Temperature ◽  
Metal Dispersion ◽  
Tungsten Oxides ◽  
Supported Pt Catalysts

Catalysts based on zirconia- and alumina-supported tungsten oxides (15 wt % W) with a small loading of platinum (0.3 wt % Pt) were selected to study the influence of the reduction temperature and the nature of the support on the hydroisomerization of n-dodecane. The reduction temperature has a major influence on metal dispersion, which impacts the catalytic activity. In addition, alumina and zirconia supports show different catalytic properties (mainly acid site strength and surface area), which play an important role in the conversion. The NH3-TPD profiles indicate that the acidity in alumina-based catalysts is clearly higher than that in their zirconia counterparts; this acidity can be attributed to a stronger interaction of the WOx species with alumina. The PtW/Al catalyst was found to exhibit the best catalytic performance for the hydroisomerization of n-dodecane based on its higher acidity, which was ascribed to its larger surface area relative to that of its zirconia counterparts. The selectivity for different hydrocarbons (C7–10, C11 and i-C12) was very similar for all the catalysts studied, with branched C12 hydrocarbons being the main products obtained (~80%). The temperature of 350 °C was clearly the best reduction temperature for all the catalysts studied in a trickled-bed-mode reactor.

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