Solid-Liquid Phase Transfer Catalytic Synthesis. VII The Synthesis of α-Substituted-2-pyridylmethyl-amineviathe Alkylation of Benzaldehyde Imine
摘要:
The anion derived from the benzaldehyde imine 2 reacts with alkyl halide to form alkylated products 3; Hydrolysis of 3 gives alpha-alkyl-2 pyridylmethylamine in 34-53% overall yield.
Enantioselective C--C bond formation to 2-pyridinesulfonylimines afforded products with good enantioselectivity. Dynamic induction of chirality on the sulfur by coordination of a chiral Lewis acid to the pyridine nitrogen and one of the prochiral sulfonyl oxygens induces enantioselectivity. Since the 2-pyridinesulfonyl group can easily be removed after the reaction, it acts not only as an activating
Complexation d'iminopyridines par le sel de zeise: voie d'access a des conjugues estradiol-cis-dichloro platine. Etude structure du complexe cis-PtCl2[C5H4NCH2NC(CH3)C6H4OH],H2O
作者:Philippe Pointeau、Henri Patin、Abdelhamid Mousser、Jean-Yves Le Marouille
DOI:10.1016/0022-328x(86)80303-5
日期:1986.9
and characterized. The (2-pyridyl)CHNR1 and (2-pyridyl)CH2NCR1R2 ligands react with Zeise'ssalt to afford directly the pentagonal chelates PtCl2L. Their structure and the cis-stereo-chemistry were shown by the usual spectroscopic methods and for cis-PtCl2[C5H4NCH2NC(CH3)C6H4OH],H2O by an X-ray diffractionstudy. On the other hand, the (2-pyridyl)(CH2)2NCR1R2 ligands do not afford the expected hexagonal
protocol for the regioselective hydroxylation of sp2 and sp3 C–H bonds using a directing group, stoichiometric amounts of Cu and H2O2. A wide array of aromatic ketones and aldehydes are oxidized in the carbonyl γ-position with remarkable yields. We also expanded this methodology to hydroxylate the β-position of alkylic ketones. Spectroscopic characterization, kinetics, and density functional theory calculations
与其他金属相比,将铜用于C–H键功能化的研究相对较少。在本文中,我们报告了使用导向基团,化学计量的Cu和H 2 O 2对sp 2和sp 3 C–H键的区域选择性羟基化的合成方案。各种各样的芳族酮和醛在羰基γ位被氧化,收率很高。我们还扩展了该方法以羟基化烷基酮的β-位。光谱表征,动力学和密度泛函理论计算都指向单核LCu II(OOH)物种的参与,该物种会氧化芳香族sp 2 通过协调的杂合O-O键裂解C-H键,并伴随对芳烃系统的亲电子攻击。
Aerobic C−H Hydroxylation by Copper Imine Complexes: The Clip‐and‐Cleave Concept – Versatility and Limits
hydroxylation reactions. While the radical based mechanisms are more difficult to identify, the reactions that go through a copper bis(μ-oxido) complex as active species can be analyzed by low temperature stopped-flow techniques. In an ideal case the formation and decomposition of this reactive intermediate can be spectroscopically observed. It was shown that this depends strongly on the ligand system: steric effects
Synthesis and NMR elucidation of novel penta-cycloundecane amine derivatives as potential antituberculosis agents
作者:Oluseye K. Onajole、Thavendran Govender、Maya Makatini、Hendrik G. Kruger
DOI:10.1002/mrc.2305
日期:2008.11
The synthesis and NMRelucidation of five novel penta‐cycloundecane amine derivatives are reported. These compounds are potential antituberculosis agents. The 1H and 13C spectra showed major overlapping of methine signals of the cage skeleton making it extremely difficult to elucidate these compounds. The overlapping occurs as a result of the additions made to the carbonyl carbon (C‐8/C‐11) of the