Highly efficient and eco-friendly synthesis of tertiary amines by reductive alkylation of aldehydes with secondary amines over a Pt nanowires catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 81395-81398 ◽  
Author(s):  
Junjie Wu ◽  
Shuanglong Lu ◽  
Danhua Ge ◽  
Hongwei Gu
Keyword(s):  
Direct Interaction ◽  
Environmentally Friendly ◽  
Secondary Amines ◽  
Tertiary Amines ◽  
Reductive Alkylation ◽  
Reaction Conditions ◽  
Highly Efficient ◽  
Environmentally Friendly Method ◽  
Pt Nanowires

A highly efficient and environmentally friendly method for the synthesis of tertiary amines by direct interaction of aldehydes with secondary amines was reported over a Pt NWs catalyst under mild reaction conditions.

Preparation of aromatic amines by copper-catalyzed coupling of boronic acids with aqueous ammonia

2010 ◽  
Vol 88 (9) ◽  
pp. 964-968 ◽  
Author(s):  
Zhaoqiong Jiang ◽  
Zhiqing Wu ◽  
Lixia Wang ◽  
Di Wu ◽  
Xiangge Zhou
Keyword(s):  
Aromatic Amines ◽  
Aqueous Ammonia ◽  
Environmentally Friendly ◽  
Boronic Acids ◽  
Reaction Conditions ◽  
Highly Efficient ◽  
Primary Aromatic Amines

A simple, highly efficient, and environmentally friendly protocol for the synthesis of primary aromatic amines by catalytic coupling of aromatic boronic acids with aqueous ammonia has been developed by using commercial and inexpensive CuSO4·5H2O as catalyst without addition of other solvents under mild reaction conditions.

scholarly journals Regioselective synthesis of benzonitriles via amino-catalyzed [3+3] benzannulation reaction

2020 ◽  
Vol 44 (9-10) ◽  
pp. 592-597
Author(s):  
Lin Jiang ◽  
Wen-Fei Jin ◽  
Liu-Dong Yu ◽  
Ming-Wei Yuan ◽  
Hong-Li Li ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Regioselective Synthesis ◽  
Reaction Conditions ◽  
Unsaturated Aldehydes ◽  
High Yields ◽  
Environmentally Friendly Method

A straightforward synthesis of benzonitriles is achieved via amino-catalyzed [3+3] benzannulation of α,β-unsaturated aldehydes and 4-arylsulfonyl-2-butenenitriles. Using pyrrolidine as an organocatalyst via iminium activation, a series of substituted benzonitriles were obtained in good to high yields in a regioselective manner. This reaction can proceed smoothly under mild reaction conditions and without the aid of any metals, additional oxidants, or strong bases, thus making this an efficient and environmentally friendly method to access benzonitriles.

scholarly journals Anthranilic acids from isatin: an efficient, versatile and environmentally friendly method

2015 ◽  
Vol 87 (3) ◽  
pp. 1525-1529 ◽  
Author(s):  
GABRIEL F. RIO ◽  
BÁRBARA V. SILVA ◽  
SABRINA T. MARTINEZ ◽  
ANGELO C. PINTO
Keyword(s):  
Reaction Time ◽  
Nitrogen Atom ◽  
Aromatic Ring ◽  
Room Temperature ◽  
Environmentally Friendly ◽  
Reaction Conditions ◽  
Anthranilic Acids ◽  
Environmentally Friendly Method

This paper describes the preparation of a series of 16 anthranilic acids in yields ranging from 51 to 97%, by treating the isatins with NaOH and H2O2. Independently of the nature of the substituent on the aromatic ring, the reactions were complete in 15 min at room temperature, whereas those of isatins containing a substituent on the nitrogen atom required longer reaction time for completion (45 min) under the same reaction conditions.

Application of highly efficient and reusable H3PW12O40/Fe3O4@SiO2-Pr-Pi nanocatalyst for preparation of dihydro-2-oxypyrrole derivatives

2021 ◽  
Vol 99 (1) ◽  
pp. 72-78
Author(s):  
Shiva Zafari ◽  
Ramin Ghorbani-Vaghei ◽  
Sedigheh Alavinia
Keyword(s):  
Magnetic Nanoparticles ◽  
Ftir Spectroscopy ◽  
Heterogeneous Catalyst ◽  
Environmentally Friendly ◽  
Dimethyl Acetylenedicarboxylate ◽  
Nanostructured Catalyst ◽  
Reaction Conditions ◽  
Highly Efficient ◽  
Magnetically Separable ◽  
Modified Magnetic Nanoparticles

In this study, a novel heterogeneous catalyst (H3PW12O40/Fe3O4@SiO2-Pr-Pi) was prepared via immobilization of H3PW12O40 on the surface of piperidine modified magnetic nanoparticles (Fe3O4@SiO2-Pr-Pi). The synthesis of dihydro-2-oxypyrrole derivatives was carried out by the reaction of substituted aniline, formaldehyde, and dimethyl acetylenedicarboxylate, promoted by H3PW12O40/Fe3O4@SiO2-Pr-Pi in EtOH. The formation of resultant catalyst was confirmed by FTIR spectroscopy, FE-SEM, EDX, VSM, and TGA techniques. The magnetically separable and environmentally friendly nanostructured catalyst remained quite stable during reaction conditions and was reused for at least five recycle runs.

scholarly journals Iodine Monoacetate for Efficient Oxyiodinations of Alkenes and Alkynes

Synlett ◽  
2017 ◽  
Vol 29 (04) ◽  
pp. 415-418 ◽  
Author(s):  
Thomas Wirth ◽  
Tobias Hokamp ◽  
Alena Storm ◽  
Mekhman Yusubov
Keyword(s):  
Acetic Acid ◽  
Acetic Anhydride ◽  
Environmentally Friendly ◽  
One Pot ◽  
Efficient Approach ◽  
Highly Efficient ◽  
Environmentally Friendly Method

A novel and inexpensive, environmentally friendly method for the preparation of iodine monoacetate is presented using iodine and Oxone in acetic acid/acetic anhydride. The reagent is used in a highly efficient approach for the regio- and diastereoselective iodo­acetoxylation of alkenes and alkynes in a simple one-pot process.

Reaction of arylmethylenemalonaldehydes with some nucleophiles

1987 ◽  
Vol 52 (11) ◽  
pp. 2699-2709 ◽  
Author(s):  
Dalimil Dvořák ◽  
Zdeněk Arnold
Keyword(s):  
Inorganic Anions ◽  
Secondary Amines ◽  
Tertiary Amines ◽  
Primary And Secondary Amines ◽  
Dipolar Structure

Reaction of arylmethylenemalonaldehydes with tributylphosphine and tertiary amines affords compounds of dipolar structure whereas reaction with primary and secondary amines leads to 1,4-addition products. Salts of nucleophilic inorganic anions add to arylmethylenemalonaldehydes under formation of salts of substituted malonaldehydes.

Catalytic asymmetric hydrogenation reaction by in situ formed ultra-fine metal nanoparticles in live thermophilic hydrogen-producing bacteria

Nanoscale ◽  
2021 ◽  
Author(s):  
Wei Bing ◽  
Faming Wang ◽  
Yuhuan Sun ◽  
Jinsong Ren ◽  
Xiaogang Qu
Keyword(s):  
Metal Nanoparticles ◽  
Catalytic Hydrogenation ◽  
Asymmetric Hydrogenation ◽  
Environmentally Friendly ◽  
Hydrogenation Reaction ◽  
Highly Efficient ◽  
Hydrogenation Reactions ◽  
Live Bacteria ◽  
Catalytic Asymmetric Hydrogenation

An environmentally friendly biomimetic strategy has been presented and validated for the catalytic hydrogenation reaction in live bacteria. In situ formed ultra-fine metal nanoparticles can realize highly efficient asymmetric hydrogenation reactions.

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