Nachbargruppeneffekte bei der massenspektrometrischen Fragmentierung: N-Acetyl-?-Phenylalkylamine. 20. Mitteilung �ber das massenspektrometrische verhalten von stickstoffverbindung
作者:Ren� Wild、Manfred Hesse
DOI:10.1002/hlca.19740570219
日期:——
The mass spectral behaviour of the difunctional alkane N-acetyl-4-phenyl-butylamine (3) was investigated. The main fragmentation of compound 3 is caused by the interaction on the two functional groups, which could be shown by comparison of the corresponding monofunctional compounds n-butylbenzene (4) and N-acetyl-n-butylamine (5). On the bases of high resolution data, the analyses of metastable transitions
Copper‐Catalyzed N−F Bond Activation for Uniform Intramolecular C−H Amination Yielding Pyrrolidines and Piperidines
作者:Daniel Bafaluy、José María Muñoz‐Molina、Ignacio Funes‐Ardoiz、Sebastian Herold、Adiran J. de Aguirre、Hongwei Zhang、Feliu Maseras、Tomás R. Belderrain、Pedro J. Pérez、Kilian Muñiz
DOI:10.1002/anie.201902716
日期:2019.6.24
The dual function of the N−F bond as an effective oxidant and subsequent nitrogen source in intramolecular aliphatic C−H functionalization reactions is explored. Copper catalysis is demonstrated to exercise full regio‐ and chemoselectivity control, which opens new synthetic avenues to nitrogenated heterocycles with predictable ring sizes. For the first time, a uniform catalysis manifold has been identified
hydrogen-deuterium (H-D) exchange reaction on the benzylic site proceeded in D2O in the presence of a small amount of H2 gas. The use of the Pd/C-ethylenediamine complex [Pd/C(en)] as a catalyst instead of Pd/C led to the efficient deuterium incorporation into the benzylic site of O-benzyl protective groups without hydrogenolysis. These H-D exchange reactions provide a post synthetic and D(2)-gas-free deuterium-labeling
Mechanistic Studies on the Synthesis of Pyrrolidines and Piperidines via Copper-Catalyzed Intramolecular C–H Amination
作者:José María Muñoz-Molina、Daniel Bafaluy、Ignacio Funes-Ardoiz、Adiran de Aguirre、Feliu Maseras、Tomás R. Belderrain、Pedro J. Pérez、Kilian Muñiz
DOI:10.1021/acs.organomet.2c00095
日期:2022.5.9
We have recently developed a method for the synthesis of pyrrolidines and piperidinesviaintramolecular C–H amination of N-fluoride amides using [TpxCuL] complexes as precatalysts [Tpx = tris(pyrazolyl)borate ligand and L = THF or CH3CN]. Herein, we report mechanistic studies on this transformation, which includes the isolation and structural characterization of a fluorinated copper(II) complex, [(TpiPr2OH)CuF]
我们最近开发了一种使用 [Tp x CuL] 配合物作为预催化剂 [Tp x = 三(吡唑基)硼酸盐配体和 L = THF 或 CH 3通过N-氟化物酰胺的分子内 C-H 胺化合成吡咯烷和哌啶的方法中国]。在此,我们报告了关于这种转变的机理研究,其中包括氟化铜 (II) 配合物 [(Tp iPr2 OH)CuF] [Tp iPr = 氢化三(3,5-二异丙基吡唑基)硼酸盐] 的分离和结构表征,相关到机械路径。Tp x的性质的影响已经从实验和计算的角度研究了铜催化剂中的配体以及用作反应物的 N-X 酰胺中的卤化物。