37031-30-4Relevant articles and documents
Chiral Aluminum Complex Controls Enantioselective Nickel-Catalyzed Synthesis of Indenes: C?CN Bond Activation
Luan, Yu-Xin,Peng, Qian,Ye, Mengchun,Zhang, Tao,Zheng, Su-Juan
supporting information, p. 7439 - 7443 (2020/03/24)
A chiral aluminum complex controlled, enantioselective nickel-catalyzed domino reaction of aryl nitriles and alkynes proceeding by C?CN bond activation was developed. The reaction provides various indenes, bearing chiral all-carbon quaternary centers, under mild reaction conditions in yields of 32 to 91 percent and ee values within the 73–98 percent range. The reaction mechanism and aspects of stereocontrol were investigated by DFT calculations.
Enantioselective Direct Synthesis of syn- and anti-α,β-Dihydroxy γ-Keto Esters Using a Dinuclear Zinc–AzePhenol Complex
Zhang, Zhao-Fei,Yang, Xiao-Chao,Lu, Hui-Jie,Wang, Min-Can
, p. 785 - 793 (2018/02/21)
A one-step enantioselective direct synthesis of both syn- and anti-α,β-dihydroxy γ-keto esters using a dinuclear zinc–AzePhenol complex is presented. This asymmetric α-hydroxyacetate aldol reaction proceeds in moderate to good yield and with excellent ena
Chiroptical properties of 2,2’-bioxirane
Daugey,De Rycke,Brotin,Buffeteau
supporting information, p. 342 - 350 (2018/01/15)
The two enantiomers of 2,2′-bioxirane were synthesized, and their chiroptical properties were thoroughly investigated in various solvents by polarimetry, vibrational circular dichroism (VCD), and Raman optical activity (ROA). Density functional theory (DFT) calculations at the B3LYP/aug-cc-pVTZ level revealed the presence of three conformers (G+, G?, and cis) with Gibbs populations of 51, 44, and 5% for the isolated molecule, respectively. The population ratios of the two main conformers were modified for solvents exhibiting higher dielectric constants (G? form decreases whereas G+ form increases). The behavior of the specific optical rotation values with the different solvents was correctly reproduced by time-dependent DFT calculations using the polarizable continuum model (PCM), except for the benzene for which explicit solvent model should be necessary. Finally, VCD and ROA spectra were perfectly reproduced by the DFT/PCM calculations for the Boltzmann-averaged G+ and G? conformers.