99 research outputs found
First Examples of Improved Catalytic Asymmetric C−C Bond Formation Using the Monodentate Ligand Combination Approach
Full text linkAsymmetric Conjugate Additionof Arylboronic Acids to Enones Catalyzed by Rhodium-MonodentatePhosphoramidite Complexes in the Presence of Bases
Get PDFRhodium(I)-catalyzed 1,4-addition of arylboronic acids to α,β-unsaturatedcarbonyl compounds was carried out in the presence of a chiral phosphoramiditeligand based on (R)-binol and dialkylamines.The reaction was significantly accelerated in the presence of abase such as KOH and Et3N, allowing the reaction to becompleted within 6 hours at 50 °C. The additionto 2-cyclohexenone achieved enantioselectivities up to 99%,though they were less effective for 2-cyclopentenone (79% ee),2-cycloheptenone (77% ee) and acyclic enones (31-43% ee)
ChemInform Abstract: A Conjugate Addition of Arylboronic Acids to α,β-Unsaturated Carbonyl Compounds Catalyzed by 2β-CD-[Rh(OH)(cod)]2 or [RhCl(cod)]2 in a Single Aqueous Medium.
No full textRhodium-Catalyzed 1,4-Addition of Arylboronic Acids to α,β-Unsaturated Carbonyl Compounds: Large Accelerating Effects of Bases and Ligands.
No full textAsymmetric Conjugate Additionof Arylboronic Acids to Enones Catalyzed by Rhodium-MonodentatePhosphoramidite Complexes in the Presence of Bases
No full textRhodium-Catalyzed 1,4-Addition of Arylboronic Acids to α,β-Unsaturated Carbonyl Compounds: Large Accelerating Effects of Bases and Ligands
No full textAsymmetric Conjugate Additionof Arylboronic Acids to Enones Catalyzed by Rhodium-MonodentatePhosphoramidite Complexes in the Presence of Bases
No full textICONE18-29214 FAST BREEDER REACTOR CORE CONCEPT TO IMPROVE NUCLEAR PROLIFERATION RESISTANCE
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Asymmetric Conjugate 1,4-Addition of Arylboronic Acids to α,β-Unsaturated Esters Catalyzed by Rhodium(I)/( S
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