Iridium-catalyzed orthogonal and regioselective synthesis of triazole disulfides in aqueous media under mild conditions

2020 ◽  
Vol 22 (8) ◽  
pp. 2394-2398 ◽  
Author(s):  
Ming Li ◽  
Nan Zheng ◽  
Junhao Li ◽  
Yubin Zheng ◽  
Wangze Song
Keyword(s):  
Aqueous Media ◽  
Regioselective Synthesis ◽  
Biological Media ◽  
Mild Conditions ◽  
Catalyzed Reactions

Triazole disulfides were prepared in water or biological media under mild conditions by orthogonal and regioselective Ir-catalyzed reactions.

ChemInform Abstract: Metal Free ipso Iodination of Arylboronic Acids Using CTAB/I2in Aqueous Media: Green and Regioselective Synthesis of Aryliodides under Mild Conditions.

ChemInform ◽  
2015 ◽  
Vol 46 (35) ◽  
pp. no-no
Author(s):  
Rajesh H. Tale ◽  
Gopal K. Toradmal ◽  
Venkatesh B. Gopula ◽  
Atish H. Rodge ◽  
Rajendra P. Pawar ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Regioselective Synthesis ◽  
Metal Free ◽  
Arylboronic Acids ◽  
Mild Conditions

Metal free ipso iodination0 of arylboronic acids using CTAB/I2 in aqueous media: green and regioselective synthesis of aryliodides under mild conditions

2015 ◽  
Vol 56 (21) ◽  
pp. 2699-2703 ◽  
Author(s):  
Rajesh H. Tale ◽  
Gopal K. Toradmal ◽  
Venkatesh B. Gopula ◽  
Atish H. Rodge ◽  
Rajendra P. Pawar ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Regioselective Synthesis ◽  
Metal Free ◽  
Arylboronic Acids ◽  
Mild Conditions

scholarly journals Nitrile Synthesis with Aldoxime Dehydratases: A Biocatalytic Platform with Applications in Asymmetric Synthesis, Bulk Chemicals, and Biorefineries

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4466
Author(s):  
Pablo Domínguez de María
Keyword(s):  
Asymmetric Synthesis ◽  
Organic Solvents ◽  
Raw Materials ◽  
Aqueous Media ◽  
Industrial Processes ◽  
Polymer Chemistry ◽  
Fine Chemicals ◽  
Mild Conditions ◽  
Bulk Chemicals ◽  
Recent Developments

Nitriles comprise a broad group of chemicals that are currently being industrially produced and used in fine chemicals and pharmaceuticals, as well as in bulk applications, polymer chemistry, solvents, etc. Aldoxime dehydratases catalyze the cyanide-free synthesis of nitriles starting from aldoximes under mild conditions, holding potential to become sustainable alternatives for industrial processes. Different aldoxime dehydratases accept a broad range of aldoximes with impressive high substrate loadings of up to >1 Kg L−1 and can efficiently catalyze the reaction in aqueous media as well as in non-aqueous systems, such as organic solvents and solvent-free (neat substrates). This paper provides an overview of the recent developments in this field with emphasis on strategies that may be of relevance for industry and sustainability. When possible, potential links to biorefineries and to the use of biogenic raw materials are discussed.

Flavan derivatives. XVII. Epimerization of the benzylic 4-hydroxyl group in flavan-3,4-diols and the formation of 4-alkyl ethers by solvolysis

1967 ◽  
Vol 20 (10) ◽  
pp. 2151
Author(s):  
JW Clark-Lewis ◽  
LR Williams
Keyword(s):  
Aqueous Media ◽  
Cyclic Ether ◽  
Hydroxyl Group ◽  
Mechanism Of Formation ◽  
Enol Ether ◽  
Mild Conditions ◽  
Ethoxyl Group ◽  
Alkyl Ethers ◽  
By Products ◽  
Thermodynamic Factors

Epimerization and solvolysis of the benzylic 4-hydroxyl group is shown to be a general property of flavan-3,4-diols, and the diols give 4- ethoxyflavan-3-ols with ethanolic hydrochloric acid (1%). The diols are first converted into epimeric mixtures of 3,4-cis- and 3,4-trans-diols and in aqueous media cis-cis-flavan-3,4-diols yield mainly 2,3-cis-3,4- trans-diols. These 2,3-cis-3,4-diols undergo solvolysis to yield 2,3- cis-3,4-trans-4-ethoxyflavan-3-ols in which the 3,4-trans- stereochemistry is controlled by participation of the neighbouring 3ax- hydroxyl group. 2,3-trans-Flavan-3,4-diols give mixtures of trans- trans-diols and 2,3-trans-3,4-cis-diols and solvolysis first yields 2.3-trans-3,4-cis-4-ethoxyflavan-3-ols and then mixtures of the 3,4- cis- and 3,4-trans-ethers; the final proportion of these two ethers is controlled by thermodynamic factors. Solvolysis under mild conditions gives minor products considered to be 3-oxoflavans (or their enols) because of their immediate conversion into antho-cyanidins by cold acids in the presence of air, and from the formation of an enol-ether on prolonged solvolysis under more vigorous conditions. The relevance of these observations to the mechanism of formation of anthocyanidins from flavan-3,4-diols is discussed. Other by-products of solvolysis reactions include a dimeric cyclic ether (dioxan derivative) of 2,3- trans-3,4-cis-7,8,4?-trimethoxyflavan-3,4-diol. The structure and stereochemistry of solvolysis products were established by N.M.R. data; the 4-ethoxyl group in the ethers generally gave rise to an ABX3 multiplet.

Facile construction of leaf-like WO3 nanoflakes decorated on g-C3N4 towards efficient oxidation of alcohols under mild conditions

2018 ◽  
Vol 42 (20) ◽  
pp. 16523-16532 ◽  
Author(s):  
Cai Xu ◽  
Xiaozhong Wang ◽  
Gang Xu ◽  
Yingqi Chen ◽  
Liyan Dai
Keyword(s):  
Selective Oxidation ◽  
Aqueous Media ◽  
Mild Conditions ◽  
Oxidation Of Alcohols

Selective oxidation of aryl and alkyl alcohols with H2O2 in aqueous media catalyzed by a well-defined WO3/g-C3N4 composite.

scholarly journals Synthesis and functionalization of dextran-based single-chain nanoparticles in aqueous media

2017 ◽  
Vol 5 (6) ◽  
pp. 1143-1147 ◽  
Author(s):  
R. Gracia ◽  
M. Marradi ◽  
U. Cossío ◽  
A. Benito ◽  
A. Pérez-San Vicente ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Polymer Nanoparticles ◽  
Single Chain ◽  
Chain Polymer ◽  
Water Dispersible ◽  
Mild Conditions

Water-dispersible dextran-based single-chain polymer nanoparticles (SCPNs) were prepared in aqueous media and under mild conditions.

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