Design and synthesis of chiral and regenerable [2.2]paracyclophane-based NAD(P)H models and application in biomimetic reduction of flavonoids
作者:Zhou-Hao Zhu、Yi-Xuan Ding、Bo Wu、Yong-Gui Zhou
DOI:10.1039/d0sc04188b
日期:——
With the rapid development of biomimetic asymmetric reduction, the demand for efficient chiral and regenerable NAD(P)Hmodels is growing rapidly. Herein, a new class of [2.2]paracyclophane-based chiral and regenerable NAD(P)Hmodels (CYNAMs) was designed and synthesized. The first enantioselective biomimetic reduction of tetrasubstituted alkene flavonoids has been successfully realized through enzyme-like
Palladium-Catalyzed CH Bond Acetoxylation: An Approach to<i>ortho</i>-Substituted Hydroxy[2.2]paracyclophane Derivatives
作者:Petra Lennartz、Gerhard Raabe、Carsten Bolm
DOI:10.1002/adsc.201200625
日期:2012.11.26
The palladium-catalyzed direct CH bondacetoxylation of [2.2]paracyclophanes has been investigated. Various mono- and disubstituted [2.2]paracyclophanes were subjected to typical Sanford acetoxylation conditions. Oxime ethers, an oxime acetate, a pyridine, and a pyrazole with [2.2]paracyclophane cores underwent direct ortho-acetoxylation in good to excellent yields using 1–5 mol% of palladium(II) acetate
Cycloadditions of α-(4-[2.2]paracyclophanyl)-N-methyl nitrone
作者:Ashraf A. Aly、Henning Hopf、Peter G. Jones、Ina Dix
DOI:10.1016/j.tet.2006.02.047
日期:2006.5
Cycloadditions of the newly synthesized α-(4-[2.2]paracyclophanyl)-N-methyl nitrone (9) with selected dipolarophiles such as phenyl isocyanate (10), styrene (13), dimethyl acetylenedicarboxylate (15) and methylene sulfene (17) are reported. Two isolated diastereomeric oxadiazolones 11 and 12 are obtained by the reaction of 9 with 10, whereas the reaction of 9 with either 13 and/or 15 gives only one
Zinc‐Catalyzed Enantioselective [3+2] Cycloaddition of Azomethine Ylides Using Planar Chiral [2.2]Paracyclophane‐Imidazoline N,O‐ligands
作者:Sundaravel Vivek Kumar、Patrick J. Guiry
DOI:10.1002/anie.202205516
日期:2022.8.15
novel [2.2]paracyclophane-derived ligands (UCD-IMPHANOL) possessing central chirality and planar chirality has been developed. These ligands demonstrated excellent enantioselectivities in the asymmetric Zn-catalyzed azomethineylidecycloaddition.