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3,373 Newest Publications about the topic alkylation

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Preparation of polynuclear NHC complexes by post-synthetic modification of half-sandwich rhodium and iridium complexes bearing C-azolato ligands

03-Jul-2018 | Francisco Aznarez; Wen-Xi Gao; Yue-Jian Lin; F. Ekkehardt Hahn; Guo-Xin Jin, Dalton Transactions, 2018

A series of bimetallic and trimetallic complexes has been prepared by N-alkylation of mononuclear half-sandwich rhodium and iridium di-NHC complexes featuring bidentate chelate ligands composed of a classical NHC and a C-azolato donor. The shape and the separation between metal centers in the ...

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The effect of biodegradation on adamantanes in reservoired crude oils from the Bohai Bay Basin, China

24-Jun-2018 | Author(s): Xiong Cheng, Dujie Hou, Changgui Xu, Organic Geochemistry, 2018

Publication date: Available online 20 June 2018 Source:Organic Geochemistry Author(s): Xiong Cheng, Dujie Hou, Changgui Xu The effect of biodegradation on adamantanes has been studied based on a suite of genetic related crude oils with increasing degree of biodegradation from the ...

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Molecules, Vol. 23, Pages 1503: Bioactive Indanes: Proof of Concept Study for Enantioselective Synthetic Routes to PH46A, a New Potential Anti-Inflammatory Agent

21-Jun-2018 | Zhang, Tao ; Scalabrino, Gaia ; Frankish, Neil ; Sheridan, Helen, Molecules, 2018

Molecules, Vol. 23, Pages 1503: Bioactive Indanes: Proof of Concept Study for Enantioselective Synthetic Routes to PH46A, a New Potential Anti-Inflammatory Agent Molecules doi: 10.3390/molecules23071503 Authors: Tao Zhang Gaia Scalabrino Neil Frankish Helen Sheridan PH46A is a ...

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Molecules, Vol. 23, Pages 1493: Synthesis and Reactions of α-Hydroxyphosphonates

20-Jun-2018 | Rádai, Zita ; Keglevich, György, Molecules, 2018

Molecules, Vol. 23, Pages 1493: Synthesis and Reactions of α-Hydroxyphosphonates Molecules doi: 10.3390/molecules23061493 Authors: Zita Rádai György Keglevich This review summarizes the main synthetic routes towards α-hydroxyphosphonates that are known as enzyme ...

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Asymmetric Total Synthesis of (+)-Ovafolinins A and B

20-Jun-2018 | Xianhe Fang; Lei Shen; Xiangdong Hu, Chemical Communication, 2018

(+)-Ovafolinins A and B are two homologous lignans containing unique polycyclic skeletons. Benefiting from a high diastereoselective alkylation of (S)-Taniguchi lactone, a double Friedel-Crafts reaction, a global debenzylation and a Cu(OAc)2-enabled benzylic oxidative cyclization, we present ...

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Catalytic Alkylation Reactions of Weakly Acidic Carbonyl and Related Compounds Using Alkenes as Electrophiles

12-Jun-2018 | Yasuhiro Yamashita; Ryo Igarasgi; Hirotsugu Suzuki; Shu Kobayashi, Organic & Biomolecular Chemistry, 2018

Catalytic alkylation reactions of weakly acidic carbonyl and related pronucleophiles such as amides, esters, and sulfonamides with substituted alkenes are reported. In the presence of a strong Brønsted base catalyst system, potassium hexamethyldisilazide and 18-crown-10 ether, the desired ...

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Molecules, Vol. 23, Pages 1421: Synthesis of Both Enantiomers of Chiral Phenylalanine Derivatives Catalyzed by Cinchona Alkaloid Quaternary Ammonium Salts as Asymmetric Phase Transfer Catalysts

12-Jun-2018 | Jin, Lei ; Zhao, Shuai ; Chen, Xin, Molecules, 2018

Molecules, Vol. 23, Pages 1421: Synthesis of Both Enantiomers of Chiral Phenylalanine Derivatives Catalyzed by Cinchona Alkaloid Quaternary Ammonium Salts as Asymmetric Phase Transfer Catalysts Molecules doi: 10.3390/molecules23061421 Authors: Lei Jin Shuai Zhao Xin Chen A ...

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A disguised hydride in a butylmagnesium cation

06-Jun-2018 | Sumanta Banerjee; Ankur; Alex Andrews; Ajay Venugopal, Chemical Communication, 2018

The ability of the β-CH functionality in a butylmagnesium cation [Me6TREN–Mg–n-Bu]+ to quantitatively reduce benzophenone has been demonstrated. The hydridic nature of the β-CH functionality is highlighted by its abstraction using B(C6F5)3. β-CH abstraction over alkylation in [Me6TREN–Mg–n-Bu]+ ...

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Metal-free [small alpha]-alkylation of alcohols with para-quinone methides

01-Jun-2018 | Jifeng Qi; Ziyang Deng; Bo Huang; Sunliang Cui, Organic & Biomolecular Chemistry, 2018

A metal-free α-alkylation of alcohols with para-quinone methides (p-QMs) for accessing alcohol-containing phenols and dihydroisocoumarins has been developed. The alcohols were converted to α-oxy radicals in the presence of di-tert-butyl peroxide (DTBP), which were added to p-QMs for aromatization ...

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Metal-free [small alpha]-alkylation of alcohols with para-quinone methides

01-Jun-2018 | Jifeng Qi; Ziyang Deng; Bo Huang; Sunliang Cui, Organic & Biomolecular Chemistry, 2018

A metal-free α-alkylation of alcohols with para-quinone methides (p-QMs) for accessing alcohol-containing phenols and dihydroisocoumarins has been developed. The alcohols were converted to α-oxy radicals in the presence of di-tert-butyl peroxide (DTBP), which were added to p-QMs for aromatization ...

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