scholarly journals Counterion-Enhanced Pd/Enamine Catalysis: Direct Asymmetric α-Allylation of Aldehydes with Allylic Alcohols by Chiral Amines and Achiral or Racemic Phosphoric Acids

2020 ◽  
Vol 86 (1) ◽  
pp. 850-860
Author(s):  
Ádám Márk Pálvölgyi ◽  
Jakob Smith ◽  
Michael Schnürch ◽  
Katharina Bica-Schröder
Keyword(s):  
Chiral Amines ◽  
Allylic Alcohols ◽  
Enamine Catalysis ◽  
Phosphoric Acids

Active MnO2 As a Mild Oxidizing Reagent for the Controlled Oxidation of Benzylic and Allylic Alcohols

2012 ◽  
Vol 2 (6) ◽  
pp. 48-48
Author(s):  
Y. M. Nandurkar Y. M. Nandurkar ◽  
◽  
B. B. Bahule B. B. Bahule
Keyword(s):  
Allylic Alcohols

Bimetallic Radical Redox-Relay Catalysis for the Isomerization of Epoxides to Allylic Alcohols

2019 ◽  
Author(s):  
Ke-Yin Ye ◽  
Terry McCallum ◽  
Song Lin
Keyword(s):  
Ring Opening ◽  
High Reactivity ◽  
Hydrogen Atom Transfer ◽  
Organic Radicals ◽  
Epoxide Ring ◽  
Allylic Alcohols ◽  
Epoxide Ring Opening ◽  
Bond Forming ◽  
Co Catalysts ◽  
The Rich

Organic radicals are generally short-lived intermediates with exceptionally high reactivity. Strategically, achieving synthetically useful transformations mediated by organic radicals requires both efficient initiation and selective termination events. Here, we report a new catalytic strategy, namely bimetallic radical redox-relay, in the regio- and stereoselective rearrangement of epoxides to allylic alcohols. This approach exploits the rich redox chemistry of Ti and Co complexes and merges reductive epoxide ring opening (initiation) with hydrogen atom transfer (termination). Critically, upon effecting key bond-forming and -breaking events, Ti and Co catalysts undergo proton-transfer/electron-transfer with one another to achieve turnover, thus constituting a truly synergistic dual catalytic system.<br>

Direct and Selective Synthesis of Adipic and Other Dicarboxylic Acids by Palladium‐Catalyzed Carbonylation of Allylic Alcohols

2020 ◽  
Vol 59 (46) ◽  
pp. 20394-20398
Author(s):  
Ji Yang ◽  
Jiawang Liu ◽  
Yao Ge ◽  
Weiheng Huang ◽  
Helfried Neumann ◽  
...  
Keyword(s):  
Dicarboxylic Acids ◽  
Allylic Alcohols ◽  
Selective Synthesis ◽  
Palladium Catalyzed

scholarly journals Boron-catalyzed dehydrative allylation of 1,3-diketones and β-ketone esters with 1,3-diarylallyl alcohols in water

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17025-17031
Author(s):  
Guo-Min Zhang ◽  
Hua Zhang ◽  
Bei Wang ◽  
Ji-Yu Wang
Keyword(s):  
Allylic Alcohols

Allylic alcohols can directly dehydrated in water by B(C6F5)3, without any base additives.

Efficient synthesis of tetrahydrofurans with chiral tertiary allylic alcohols catalyzed by Ni/P-chiral ligand DI-BIDIME

2021 ◽  
Author(s):  
Yu Mu ◽  
Tao Zhang ◽  
Yaping Cheng ◽  
Wenzhen Fu ◽  
Zuting Wei ◽  
...  
Keyword(s):  
Reductive Cyclization ◽  
Allylic Alcohols ◽  
Chiral Ligand ◽  
Efficient Synthesis

Efficient nickel-catalyzed stereoselective asymmetric intramolecular reductive cyclization of O-alkynones with P-chiral bisphosphorus ligand DI-BIDIME is reported.

Practical allylation with unactivated allylic alcohols under mild conditions

2021 ◽  
Author(s):  
Shuangshuang Li ◽  
Ju Qiu ◽  
Bowen Li ◽  
Zuolian Sun ◽  
Peizhong Xie ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Catalytic System ◽  
Allylic Alcohols ◽  
Mild Conditions ◽  
Accelerate Proton

A practical palladium/calcium catalytic system was developed for dehydrative allylation concerning unactivated allylic alcohols. EtOH solvent with H2O additive was identified as powerful media to accelerate proton transfer. That catalytic...

Facile access to benzofuran-fused tetrahydropyridines via catalytic asymmetric [4 + 2] cycloaddition of aurone-derived 1-azadienes with 3-vinylindoles

2021 ◽  
Author(s):  
Wai Lean Koay ◽  
Guang-Jian Mei ◽  
Yixin Lu
Keyword(s):  
Cycloaddition Reaction ◽  
Wide Range ◽  
Catalytic Asymmetric ◽  
Phosphoric Acids

A highly enantioselective [4 + 2] cycloaddition reaction of aurone-derived 1-azadienes with 3-vinylindoles has been developed. In the presence of chiral phosphoric acids, a wide range of benzofuran-fused tetrahydropyridines with...

Iminophosphorane-mediated regioselective umpolung alkylation reaction of α-iminoesters

2021 ◽  
Author(s):  
Yasushi Yoshida ◽  
Mayu Kukita ◽  
Kazuki Omori ◽  
Takashi Mino ◽  
Masami Sakamoto
Keyword(s):  
Asymmetric Reactions ◽  
Alkylation Reaction ◽  
Chiral Amines ◽  
Efficient Manner

Umpolung reactions of imines, especially the asymmetric reactions, have been extensively studied as they provide access to important chiral amines in an efficient manner. The reactions studied range from simple...

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