ChemInform Abstract: Ascorbic Acid Promoted Metal-Free Synthesis of Aryl Sulfides with Anilines Nitrosated in situ by tert-Butyl Nitrite.

ChemInform ◽  
2016 ◽  
Vol 47 (1) ◽  
Author(s):  
Mei-jie Bu ◽  
Guo-ping Lu ◽  
Chun Cai
Keyword(s):  
Ascorbic Acid ◽  
Metal Free ◽  
Tert Butyl ◽  
Aryl Sulfides

Ascorbic Acid Promoted Metal-Free Synthesis of Aryl Sulfides with Anilines Nitrosated in Situ by tert-Butyl Nitrite

Synlett ◽  
2015 ◽  
Vol 26 (13) ◽  
pp. 1841-1846 ◽  
Author(s):  
Chun Cai ◽  
Mei-jie Bu ◽  
Guo-ping Lu
Keyword(s):  
Ascorbic Acid ◽  
Metal Free ◽  
Tert Butyl ◽  
Aryl Sulfides

scholarly journals Chemoselective and metal-free reduction of α,β-unsaturated ketones by in situ produced benzeneselenol from O-(tert-butyl) Se-phenyl selenocarbonate

RSC Advances ◽  
2020 ◽  
Vol 10 (56) ◽  
pp. 33706-33717
Author(s):  
Andrea Temperini ◽  
Marco Ballarotto ◽  
Carlo Siciliano
Keyword(s):  
Double Bond ◽  
Hydrochloric Acid ◽  
Unsaturated Ketones ◽  
Metal Free ◽  
Tert Butyl ◽  
Carbon Double Bond

The carbon–carbon double bond of arylidene acetones and chalcones can be selectively reduced with benzeneselenol generated in situ by reacting O-(tert-butyl) Se-phenyl selenocarbonate with hydrochloric acid in ethanol.

scholarly journals α-Acetoxyarone synthesis via iodine-catalyzed and tert-butyl hydroperoxide-mediateded self-intermolecular oxidative coupling of aryl ketones

2017 ◽  
Vol 13 ◽  
pp. 1079-1084 ◽  
Author(s):  
Liquan Tan ◽  
Cui Chen ◽  
Weibing Liu
Keyword(s):  
Oxidative Coupling ◽  
Optimum Conditions ◽  
Butyl Hydroperoxide ◽  
Metal Free ◽  
Tert Butyl ◽  
Radical Intermediates ◽  
Tert Butyl Hydroperoxide ◽  
Aryl Ketones

We present a metal-free method for α-acetoxyarone synthesis by self-intermolecular oxidative coupling of aryl ketones using I2−tert-butyl hydroperoxide (TBHP). Under the optimum conditions, various aryl ketones gave the corresponding products in moderate to excellent yields. A series of control experiments were performed; the results suggest the involvement of radical pathways. Multiple radical intermediates were generated in situ and the overall process involved several different reactions, which proceeded self-sequentially in a single reactor. A labeling experiment using 18O-labeled H2O confirmed that the oxygen in the product was derived from TBHP, not from H2O in the TBHP solvent.

scholarly journals Sodium nitrite and ascorbic acid: a metal-free combination that controls the free-radical polymerization of tert-butyl methacrylate in water

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Christophe Detrembleur ◽  
Ange Mouithys-Mickalad ◽  
Philippe Teyssié ◽  
Robert Jérôme
Keyword(s):  
Nitric Oxide ◽  
Ascorbic Acid ◽  
Free Radical ◽  
Radical Polymerization ◽  
Sodium Nitrite ◽  
Free Radical Polymerization ◽  
Nitroxyl Radicals ◽  
Butyl Methacrylate ◽  
Metal Free ◽  
Tert Butyl

AbstractA mixture of sodium nitrite and ascorbic acid is able to control the radical polymerization of tert-butyl methacrylate (tBMA) in water at 80°C. Indeed, sodium nitrite is reduced by the ascorbic acid, and the nitric oxide (NO) which is formed insitu is nothing but a promoter of nitroxyl radicals. The radical polymerization of tBMA is thus basically controlled by a nitroxide-mediated process.

ChemInform Abstract: Transition-Metal-Free Oxychlorination of Alkenyl Oximes: In situ Generated Radicals with tert-Butyl Nitrite.

ChemInform ◽  
2016 ◽  
Vol 47 (50) ◽  
Author(s):  
Xiao-Wei Zhang ◽  
Zu-Feng Xiao ◽  
Mei-Mei Wang ◽  
Yan-Jun Zhuang ◽  
Yan-Biao Kang
Keyword(s):  
Transition Metal ◽  
Metal Free ◽  
Tert Butyl

scholarly journals Improved, Odorless Access to Benzo[1,2-d;4,5-d′]- bis[1,3]dithioles and Tert-butyl Arylsulfides via C-S Cross Coupling

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3666
Author(s):  
Kevin Kopp ◽  
Olav Schiemann ◽  
Nico Fleck
Keyword(s):  
Lewis Acids ◽  
Fluorescent Dyes ◽  
Palladium Catalysis ◽  
Functional Materials ◽  
Building Blocks ◽  
Subsequent Formation ◽  
Tert Butyl ◽  
High Yields ◽  
Aryl Sulfides

Benzo[1,2-d;4,5-d′]bis[1,3]dithioles are important building blocks within a range of functional materials such as fluorescent dyes, conjugated polymers, and stable trityl radicals. Access to these is usually gained via tert-butyl aryl sulfides, the synthesis of which requires the use of highly malodorous tert-butyl thiol and relies on SNAr-chemistry requiring harsh reaction conditions, while giving low yields. In the present work, S-tert-butyl isothiouronium bromide is successfully applied as an odorless surrogate for tert-butyl thiol. The C-S bond formation is carried out under palladium catalysis with the thiolate formed in situ resulting in high yields of tert-butyl aryl sulfides. The subsequent formation of benzo[1,2-d;4,5-d′]bis[1,3]dithioles is here achieved with scandium(III)triflate, a less harmful reagent than the usually used Lewis acids, e.g., boron trifluoride or tetrafluoroboric acid. This enables a convenient and environmentally more compliant access to high yields of benzo[1,2-d;4,5-d′]bis[1,3]dithioles.

Transition-metal-free oxychlorination of alkenyl oximes: in situ generated radicals with tert-butyl nitrite

2016 ◽  
Vol 14 (30) ◽  
pp. 7275-7281 ◽  
Author(s):  
Xiao-Wei Zhang ◽  
Zu-Feng Xiao ◽  
Mei-Mei Wang ◽  
Yan-Jun Zhuang ◽  
Yan-Biao Kang
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free ◽  
Tert Butyl ◽  
Highly Efficient

Highly efficient transition-metal-free radical oxychlorination of alkenyl oximes with t-BuONO has been developed.

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