Tag: green chemistry

Whisky lactone

Whisky Lactone Whisky lactone, also known as β-methyl-γ-octalactone or quercus lactone (from the Latin for oak treeQuercus alba), is a flavouring found in American bourbon whiskies, and is also found in all types of oak. The flavour gets into the whisky when it’s matured in oak barrels. The pure molecule has a fierce, strong, and sweet smell… Continue reading Whisky lactone

Green N-Methylation of Electron Deficient Pyrroles with Dimethylcarbonate

The N-methylation of electron-deficient pyrroles was affected using dimethyl carbonate in the presence of DMF and catalytic DABCO. This alkylation methodology has proven useful for the alkylation of a variety of pyrroles in 72−98% yields and is considered to be greenchemistry relative to the more common use of methyl halides or dimethyl sulfate. Michael L. Laurila , Nicholas A.… Continue reading Green N-Methylation of Electron Deficient Pyrroles with Dimethylcarbonate

Article On Alternative Solvents:  Shades of Green

The use of alternative reaction solvents is reviewed in terms of life cycle. Supercritical CO2, ionic liquids, fluorous solvents, water, and renewable organics are compared on the basis of their solvency, ease of use, reusability, health and safety, environmental impact, and economic cost. James H. Clark * and Stewart J. Tavener Green Chemistry Centre, Department of Chemistry, University… Continue reading Article On Alternative Solvents:  Shades of Green

GAP chemistry for pyrrolyl coumarin derivatives: a highly efficient one-pot synthesis under catalyst-free conditions

Green Chem., 2013, Advance Article DOI: 10.1039/C3GC41799A, Communication Huiyan Wang, Xuecheng Liu, Xian Feng, Zhibin Huang, Daqing Shi This synthesis was confirmed to follow the GAP chemistry process, which can avoid traditional chromatography and recrystallization purification methods. GAP chemistry for pyrrolyl coumarin derivatives: a highly efficient one-pot synthesis under catalyst-free conditions http://pubs.rsc.org/en/Content/ArticleLanding/2013/GC/C3GC41799A?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract Huiyan Wang,ab   Xuecheng Liu,a   Xian… Continue reading GAP chemistry for pyrrolyl coumarin derivatives: a highly efficient one-pot synthesis under catalyst-free conditions

Axial-to-central chirality transfer in cyclization processes

Axial-to-central chirality transfer in cyclization processes Substrates, bearing axial chirality, can cyclize intra- or inter-molecularly with concomitant transfer of axial-to-central chirality to produce at least one stereocenter. In order to satisfy a strict definition of axial-to-central chirality transfer, the initial axial chirality must be lost during the cyclization process. Highly functionalized enantiopure carbocycles and heterocycles… Continue reading Axial-to-central chirality transfer in cyclization processes

An efficient palladium catalyst on bentonite for Suzuki-Miyaura reaction at room temperature

An efficient palladium catalyst on bentonite for Suzuki-Miyaura reaction at room temperature Green Chem., 2013, Advance Article DOI: 10.1039/C3GC41469H, Paper Guodong Ding, Weitao Wang, Tao Jiang, Buxing Han The Pd/bentonite catalyst prepared by a simple impregnation method in water is very active and stable for the Suzuki-Miyaura reaction. http://pubs.rsc.org/en/Content/ArticleLanding/2013/GC/C3GC41469H?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract Clays, which are nontoxic, abundant, and… Continue reading An efficient palladium catalyst on bentonite for Suzuki-Miyaura reaction at room temperature

Chemical conversion of biomass-derived hexose sugars to levulinic acid over sulfonic acid-functionalized graphene oxide catalysts

Green Chem., 2013, 15,2935-2943 DOI: 10.1039/C3GC40353J, Paper Pravin P. Upare, Ji-Woong Yoon, Mi Yeon Kim, Hyo-Yoon Kang, Dong Won Hwang, Young Kyu Hwang, Harold H. Kung, Jong-San Chang Sulfonated graphene oxide (GO-SO3H) catalyst selectively decomposes glucose to levulinic acid (LA) with excellent yield (around 78%). Chemical conversion of biomass-derived hexose sugars to levulinic acid over sulfonic… Continue reading Chemical conversion of biomass-derived hexose sugars to levulinic acid over sulfonic acid-functionalized graphene oxide catalysts

Cyclodextrin-Modified Zeolites as Drug-Delivery Nanocontainers

Zeolites modified with aminoalkoxysilanes and cyclodextrin show different uptake and release properties depending on which silane is used Multifunctional nanocontainers for imaging, targeting, and drug release are a main research area in bio-nanomedicine. Jurriaan Huskens and colleagues, University of Twente, The Netherlands, have functionalized nanoporous zeolite L crystals with β-cyclodextrin (CD) to give multifunctional systems… Continue reading Cyclodextrin-Modified Zeolites as Drug-Delivery Nanocontainers

Ternary modified TiO2 as a simple and efficient photocatalyst for green organic synthesis

  TiO2 ternary-modified with Fe3+, Ni2+, and Au nanoparticles exhibited a noticeable photocatalytic activity for selective cyclohexane oxidation with O2 under sunlight irradiation. Ternary modified TiO2 as a simple and efficient photocatalyst for green organic synthesis Yusuke Ide,*a   Naoyuki Kawamoto,a   Yoshio Bando,a   Hideya Hattori,b   Masahiro Sadakaneb and   Tsuneji Sanob     * Corresponding authors a World Premier… Continue reading Ternary modified TiO2 as a simple and efficient photocatalyst for green organic synthesis