scholarly journals Z-selective Pd-Catalyzed 2,2,2-Trifluoroethylation of Acrylamides at Room Temperature

2021 ◽  
Author(s):  
Louise Ruyet ◽  
Ivana LAPUH ◽  
Vijay S Koshti ◽  
Tamás Földesi ◽  
Philippe Jubault ◽  
...  
Keyword(s):  
Room Temperature ◽  
Bond Activation ◽  
Hypervalent Iodine ◽  
Coupling Partner

A straightforward 2,2,2-trifluoroethylation of acrylamides by Pd-catalyzed C–H bond activation was reported by using a fluorinated hypervalent iodine reagent as a coupling partner. At room temperature, this additive-free approach allowed...

Rh(III)-Catalyzed Olefination and Alkylation of Arenes with Maleimides: A Tunable Strategy for C(sp2)–H Functionalization

Synthesis ◽  
2021 ◽  
Author(s):  
Hongji Li ◽  
Wenjie Zhang ◽  
Xueyan Liu ◽  
Zhenfeng Tian
Keyword(s):  
Room Temperature ◽  
Functional Group ◽  
Reaction Conditions ◽  
Bond Functionalization ◽  
Alkylation Process ◽  
Coupling Partner

AbstractWe herein report a new nitrogen-directed Rh(III)-catalyzed C(sp2)–H bond functionalization of N-nitrosoanilines and azoxybenzenes with maleimides as a coupling partner, in which the olefination/alkylation process can be finely controlled at room temperature by variation of the reaction conditions. This method shows excellent functional group tolerance, and presents a mild access to the resulting olefination/alkylation products in moderate to good yields.

scholarly journals Practical Synthesis of 2-Iodosobenzoic Acid (IBA) without Contamination by Hazardous 2-Iodoxybenzoic Acid (IBX) under Mild Conditions

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1897
Author(s):  
Hideyasu China ◽  
Nami Kageyama ◽  
Hotaka Yatabe ◽  
Naoko Takenaga ◽  
Toshifumi Dohi
Keyword(s):  
Aqueous Solution ◽  
Room Temperature ◽  
Practical Method ◽  
Hypervalent Iodine ◽  
Mild Conditions ◽  
Sequential Procedures ◽  
Iodine Compounds ◽  
Practical Synthesis ◽  
Iodosobenzoic Acid ◽  
Lower Temperature

We report a convenient and practical method for the preparation of nonexplosive cyclic hypervalent iodine(III) oxidants as efficient organocatalysts and reagents for various reactions using Oxone® in aqueous solution under mild conditions at room temperature. The thus obtained 2-iodosobenzoic acids (IBAs) could be used as precursors of other cyclic organoiodine(III) derivatives by the solvolytic derivatization of the hydroxy group under mild conditions of 80 °C or lower temperature. These sequential procedures are highly reliable to selectively afford cyclic hypervalent iodine compounds in excellent yields without contamination by hazardous pentavalent iodine(III) compound.

Room-Temperature Selective Aliphatic Carbon–Carbon Bond Activation and Functionalization of Ethers by Rhodium(II) Porphyrin

2011 ◽  
Vol 30 (14) ◽  
pp. 3691-3693 ◽  
Author(s):  
Siu Yin Lee ◽  
Tsz Ho Lai ◽  
Kwong Shing Choi ◽  
Kin Shing Chan
Keyword(s):  
Room Temperature ◽  
Bond Activation ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Aliphatic Carbon

Hypervalent Iodine(III)-Catalyzed Epoxidation of β-Cyanostyrenes

Synthesis ◽  
2019 ◽  
Vol 51 (23) ◽  
pp. 4473-4486 ◽  
Author(s):  
Saeesh R. Mangaonkar ◽  
Fateh V. Singh
Keyword(s):  
Reaction Time ◽  
Room Temperature ◽  
Hypervalent Iodine ◽  
Short Reaction Time ◽  
Convenient Approach

A convenient approach for the synthesis of β-cyanoepoxides is illustrated by iodine(III)-catalyzed epoxidation of electron-deficient β-cyanostyrenes, wherein the active catalytic iodine(III) species was generated in situ. The epoxidation of β-cyanostyrenes was performed using 10 mol% PhI as precatalyst in the presence of 2.0 equivalents Oxone as an oxidant and 2.4 equivalents of TFA as an additive at room temperature under ultrasonic radiations. The β-cyanoepoxides were isolated in good to excellent yields in a short reaction time.

scholarly journals Vapour-induced solid-state C–H bond activation for the clean synthesis of an organopalladium biothiol sensor

2016 ◽  
Vol 52 (88) ◽  
pp. 12960-12963 ◽  
Author(s):  
Andrea Monas ◽  
Krunoslav Užarević ◽  
Ivan Halasz ◽  
Marina Juribašić Kulcsár ◽  
Manda Ćurić
Keyword(s):  
Methyl Orange ◽  
Solid State ◽  
Room Temperature ◽  
Bond Activation ◽  
Aqueous Media ◽  
Accelerated Aging ◽  
Water Soluble ◽  
Clean Synthesis

Room-temperature accelerated aging in the solid state has been applied for quantitative azobenzene C–H bond activation by Pd(OAc)2. Water-soluble dicyclopalladated methyl orange is a selective chromogenic biothiol sensor at physiologically-relevant micromolar concentrations in aqueous media.

Dehydroxymethyl Bromination of Alkoxybenzyl Alcohols by Using a Hypervalent Iodine Reagent and Lithium Bromide

Synlett ◽  
2018 ◽  
Vol 29 (17) ◽  
pp. 2275-2278
Author(s):  
Tomohiro Maegawa ◽  
Ayako Shibata ◽  
Sara Kitamoto ◽  
Kazuma Fujimura ◽  
Yuuka Hirose ◽  
...  
Keyword(s):  
Room Temperature ◽  
Lithium Bromide ◽  
Hypervalent Iodine ◽  
Molar Ratios

We describe the dehydroxymethylbromination of alkoxybenzyl alcohol by using a hypervalent iodine reagent and lithium bromide in F3CCH2OH at room temperature. Selective monobromination or dibromination was possible by adjusting the molar ratios of hypervalent iodine reagent and lithium bromide.

scholarly journals Si–C(sp3) bond activation through oxidative addition at a Rh(i) centre

2020 ◽  
Vol 49 (17) ◽  
pp. 5416-5419
Author(s):  
S. Azpeitia ◽  
A. J. Martínez-Martínez ◽  
M. A. Garralda ◽  
A. S. Weller ◽  
M. A. Huertos
Keyword(s):  
Room Temperature ◽  
Bond Activation ◽  
Oxidative Addition

Rhodium promoted a fast, quantitative and room temperature Si–CH3 bond activation.

Reactions of Olefins with Ruthenium Hydride Nanoparticles: NMR Characterization, Hydride Titration, and Room-Temperature CC Bond Activation

2008 ◽  
Vol 47 (11) ◽  
pp. 2074-2078 ◽  
Author(s):  
Jordi García-Antón ◽  
M. Rosa Axet ◽  
Susanna Jansat ◽  
Karine Philippot ◽  
Bruno Chaudret ◽  
...  
Keyword(s):  
Room Temperature ◽  
Bond Activation ◽  
Ruthenium Hydride ◽  
Nmr Characterization

Metal-Free CH Bond Activation of Branched Aldehydes with a Hypervalent Iodine(III) Catalyst under Visible-Light Photolysis: Successful Trapping with Electron-Deficient Olefins

2014 ◽  
Vol 126 (41) ◽  
pp. 11240-11244 ◽  
Author(s):  
Shin A. Moteki ◽  
Asuka Usui ◽  
Sermadurai Selvakumar ◽  
Tiexin Zhang ◽  
Keiji Maruoka
Keyword(s):  
Visible Light ◽  
Bond Activation ◽  
Hypervalent Iodine ◽  
Metal Free
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