在十种非质子传递溶剂中研究了N-(2,4-二硝基苯基)哌啶N-氧化物的重排。对于介电常数范围为45个单位的十种溶剂,研究了一级速率系数(k obs。)与几种溶剂参数的不同相关性。分别检查了Krygowski和Fawcett,Koppel和Palm以及Kamlet和Taft的多参数方程。The k obs。值与溶剂的路易斯碱度合理地相关。当排除氢键供体溶剂时,Gutmann的供体数和Dimroth的E T(30)参数。
Reaction of Nitrogen‐Radicals with Organometallics Under Ni‐Catalysis: N‐Arylations and Amino‐Functionalization Cascades
作者:Lucrezia Angelini、Jacob Davies、Marco Simonetti、Laia Malet Sanz、Nadeem S. Sheikh、Daniele Leonori
DOI:10.1002/anie.201900510
日期:2019.4
the generation of nitrogen‐radicals by ground‐state single electron transfer with organyl–NiI species. Depending on the philicity of the N‐radical, two types of processes have been developed. In the case of nucleophilic aminyl radicals direct N‐arylation with aryl organozinc, organoboron, and organosilicon reagents was achieved. In the case of electrophilic amidyl radicals, cascade processes involving
Ground State Generation and Cyclization of Aminium Radicals in the Formation of Tetrahydroquinolines
作者:Cassie Pratley、Sabine Fenner、John A. Murphy
DOI:10.1021/acs.orglett.4c00179
日期:2024.2.16
This paper reports the first examples of ground state radical-mediated intramolecular C–H amination to afford 1-methyl-1,2,3,4-tetrahydroquinolines from N-2,4-dinitrophenoxy derivatives of arylpropylamines. Whereas the photoactivation of N-2,4-dinitrophenoxyamines for intermolecular reactions has been established, ground state chemistry provides the desired cyclization products in moderate to excellent