描述了旨在探测黄素促进的胺氧化脱氨基的研究。已发现 3-甲基发光黄素 (3MLF) 在酸(HCl 或 MgCl 2 )催化的热(80 o C)条件下促进苄胺向 N-苄基苯扎二亚胺的清洁转化。该反应受多重周转的影响。发现胺结构 (1 o >2 o >3 o ) 和 α-电离基团离开能力 (TMS + >H + ) 会影响反应性。此外,发现使用 PhCHDNH 2 为基态反应测量的内部 d-同位素效应为 4.3,该值与在几乎相同(20 o C 而不是 80 o C) 条件
描述了旨在探测黄素促进的胺氧化脱氨基的研究。已发现 3-甲基发光黄素 (3MLF) 在酸(HCl 或 MgCl 2 )催化的热(80 o C)条件下促进苄胺向 N-苄基苯扎二亚胺的清洁转化。该反应受多重周转的影响。发现胺结构 (1 o >2 o >3 o ) 和 α-电离基团离开能力 (TMS + >H + ) 会影响反应性。此外,发现使用 PhCHDNH 2 为基态反应测量的内部 d-同位素效应为 4.3,该值与在几乎相同(20 o C 而不是 80 o C) 条件
Aerobic Oxidative Coupling of Amines by Carbon Nitride Photocatalysis with Visible Light
作者:Fangzheng Su、Smitha C. Mathew、Lennart Möhlmann、Markus Antonietti、Xinchen Wang、Siegfried Blechert
DOI:10.1002/anie.201004365
日期:2011.1.17
Coupling on sunshine: A simple and efficient synthesis of benzoxazoles, benzimidazoles, and benzothiazoles is realized through a one‐pot preparation driven by a photocatalyticcascade reaction. Carbon nitride and visiblelight are employed to achieve this metal‐free aerobic oxidation of amines to imines (see scheme; mpg‐C3N4=mesoporous graphite carbon nitride).
阳光下的耦合:通过光催化级联反应驱动的一锅法制备,可实现苯并恶唑,苯并咪唑和苯并噻唑的简单有效合成。氮化碳和可见光可用于实现胺向亚胺的无金属需氧氧化(请参阅方案; mpg-C 3 N 4 =中等石墨氮化碳)。
<sup>1</sup>H NMR Chiral Analysis of Charged Molecules via Ion Pairing with Aluminum Complexes
作者:Min-Seob Seo、Hyunwoo Kim
DOI:10.1021/jacs.5b09555
日期:2015.11.11
NMR chiral solvating agents for both positively and negatively charged chiral molecules in polar or nonpolar solvents. During the formation of ion pairs between the Al(III) complexes and the chiral analytes such as amines and carboxylic acids, the metal-centered chirality in the Al complexes plays a crucial role in providing anisochronous chemical shifts to the (1)H NMR spectra. As a chiral solvating
Carbon Dioxide. A Reagent for the Protection of Nucleophilic Centers and the Simultaneous Activation for Electrophilic Attack. Part 4.<sup>1</sup>The α-Substitution of (i) Benzyl Alcohol and (ii) Benzylamine
作者:Alan R. Katritzky、Wei-Qiang Fan、Kunihiko Akutagawa
DOI:10.1055/s-1987-27970
日期:——
Benzyl alcohol is converted into a variety of α-substituted derivatives by a one-pot sequence involving lithiation of an intermediate hemicarbonate ester. Benzylamine is similarly converted by a one-pot sequence to α-substituted benzylamines: here an intermediate carbamate salt is involved.
β-Deuterium Isotope Effects on Amine Basicity, “Inductive” and Stereochemical
作者:Charles L. Perrin、Brian K. Ohta、Joshua Kuperman
DOI:10.1021/ja038343v
日期:2003.12.1
Secondary beta deuterium isotope effects on acidity constants of ammonium ions are measured using a remarkably precise NMR titration method. Deuteration is found to increase the basicity of methylamine, dimethylamine, benzylamine, and N,N-dimethylaniline. The effect is attributed to a lowered zero-point energy of a CH bond adjacent to an amine nitrogen. The method permits a determination of the stereochemical
On the mechanism of the clay catalyzed reaction of benzylamine
作者:Shelton Bank、Rumara Jewett
DOI:10.1016/s0040-4039(00)92613-3
日期:1991.1
The mechanism of the aluminum exchanged Montmorillonite catalyzed reaction of benzylamine was studied with deuterium labelled benzylamine. From the analysis of the product dibenzylamine and the recovered benzylamine extensive hydrogen exchange is observed. An SN2 process is thus unlikely and a process involving an imine is suggested.