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

Metal-Free ipso-Selenocyanation of Arylboronic Acids Using Malononitrile and Selenium Dioxide

Synthesis ◽  
2019 ◽  
Vol 51 (19) ◽  
pp. 3758-3764 ◽  
Author(s):  
Sébastien Redon ◽  
Anne Roly Obah Kosso ◽  
Julie Broggi ◽  
Patrice Vanelle
Keyword(s):  
Selenium Dioxide ◽  
New Method ◽  
Metal Free ◽  
Arylboronic Acids ◽  
Mild Conditions ◽  
Set Up

The first ipso-selenocyanation of arylboronic acids is achieved using selenium dioxide and malononitrile under mild conditions. The reaction is successful even without metal or base in DMSO. The major advantages of this new method are an easy set-up, excellent yields, and the use of odorless and inexpensive selenium reagents. Basic conditions subsequently afford new access to diaryldiselenides in good yields without isolating the organoselenocyanate intermediates.

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.

A strategy for generating aryl radicals from arylborates through organic photoredox catalysis: photo-Meerwein type arylation of electron-deficient alkenes

2018 ◽  
Vol 54 (10) ◽  
pp. 1257-1260 ◽  
Author(s):  
Y. Iwata ◽  
Y. Tanaka ◽  
S. Kubosaki ◽  
T. Morita ◽  
Y. Yoshimi
Keyword(s):  
Photoredox Catalysis ◽  
Metal Free ◽  
Arylboronic Acids ◽  
Aryl Radicals ◽  
Mild Conditions

Generation of a variety of aryl radicals from arylboronic acids through metal-free photoredox catalysis under mild conditions.

Practical Transition-Metal-Free Protodeboronation of Arylboronic Acids in Aqueous Sodium Hypochlorite

Synlett ◽  
2020 ◽  
Vol 31 (20) ◽  
pp. 2039-2042
Author(s):  
Minxin Li ◽  
Yanling Tang ◽  
Zewei Mao ◽  
Jinchun Gao ◽  
Gaoxiong Rao
Keyword(s):  
Transition Metal ◽  
Sodium Hypochlorite ◽  
Low Cost ◽  
Practical Method ◽  
Aqueous Sodium ◽  
Metal Free ◽  
Arylboronic Acids ◽  
Mild Conditions

AbstractA concise and practical method was developed for the protodeboronation of arylboronic acids under mild conditions in aqueous NaClO at 100 °C. The strategy is low-cost, transition-metal-free, and base-free.

A Sequential Ugi-Smiles / Transition-Metal-Free Endo-Dig Conia-ene Cyclization: The Selective Synthesis of Saccharin Substituted 2,5-dihydropyrroles

2021 ◽  
Author(s):  
Hassan Seyrani ◽  
Sorour Ramezanpour ◽  
Aref Vaezghaemi ◽  
Farzad Kobarfard
Keyword(s):  
Transition Metal ◽  
Free Access ◽  
Selective Synthesis ◽  
Metal Free ◽  
Mild Conditions

A convenient, transition-metal-free access to a series of unprecedented saccharin substituted 2,5-dihydropyrroles is reported. This approach employs a post-Ugi-Smiles 5-endo-dig Conia-ene cyclization sequence in mild conditions while incorporating a series...

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.

Metal‐free direct oxidative C–N bond coupling of quinoxalin‐2(1H)‐ones with azoles under mild conditions

2021 ◽  
Author(s):  
Jingwen Guo ◽  
Lina Zhang ◽  
Xinyue Du ◽  
Liting Zhang ◽  
Yuepiao Cai ◽  
...  
Keyword(s):  
Metal Free ◽  
Mild Conditions

Dissociation of imino proton(s) of a highly water-soluble metal-free phthalocyanine and determination of its pKa value in water

2013 ◽  
Vol 17 (06n07) ◽  
pp. 447-453 ◽  
Author(s):  
Hiroaki Isago ◽  
Harumi Fujita
Keyword(s):  
Aqueous Media ◽  
Thermal Reaction ◽  
Water Soluble ◽  
Acid Dissociation ◽  
Acid Dissociation Constant ◽  
Metal Free ◽  
Imino Proton ◽  
Pka Value ◽  
Triton X

Dissociation of imino proton(s) in the cavity of the macrocycle of a highly water-soluble, metal-free phthalocyanine ( H 2( H 4 tsppc ); where H 4 tsppc denotes tetrakis{(2′,6′-dimethyl-4′-sulfonic acid)phenoxy}phthalocyaninate) in ethanolic and aqueous solutions has spectrophotometrically been investigated. The spectral changes associated with reaction with NaOH have been found to involve one-proton transfer process in aqueous media while two-protons process in ethanolic media. The acid-dissociation constant of the first imino proton in water (in the presence of Triton X-100) has been determined to be 12.5 ± 0.2 (as pKa) at 25 °C. The doubly deprotonated species in EtOH has been easily converted to its corresponding cobalt(II) derivative by thermal reaction with anhydrous CoCl 2.

A metal-free radical cascade reaction of phosphine oxides with 2-aryloxy phenylacetylenes to assemble diphosphonyl xanthene derivatives

2021 ◽  
Author(s):  
Tao Fan ◽  
Yan Liu ◽  
Caina Jiang ◽  
Yanli Xu ◽  
Yan-Yan Chen
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Cascade Reaction ◽  
Phosphine Oxides ◽  
Metal Free ◽  
Mild Conditions ◽  
Xanthene Derivatives ◽  
Reaction Proceeds ◽  
Radical Cascade

A radical cascade reaction of 2-aryloxy phenylacetylene with phosphine oxides promoted by K2S2O8 was developed, provided diphosphonyl xanthenes as products. This reaction proceeds under transition metal-free and mild conditions with...

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