Base-Mediated Intramolecular Decarboxylative Synthesis of Alkylamines from Alkanoyloxycarbamates
摘要:
A general and effective method for the synthesis of alkylamine via intramolecular decarboxylation of alkanoyloxycarbamates is described. The alkanoyloxycarbamates are readily prepared with alkyl carboxylic acids and hydroxylamine. The reaction shows a broad range of substrates (primary and secondary alkyl) with functional tolerance, and the corresponding products were obtained in good yields under mild conditions.
Controllable Intramolecular Unactivated C(sp3)-H Amination and Oxygenation of Carbamates
作者:Qihang Guo、Xiang Ren、Zhan Lu
DOI:10.1021/acs.orglett.8b03299
日期:2019.2.15
catalyst-controlled intramolecular unactivated C(sp3)-H amination and oxygenation of carbamates merging visible-light photocatalysis and earth-abundant transition metal catalysis have been reported. Useful amino alcohol and diol derivatives could be selectively obtained from readily available tertiary alcohol derivatives. The possible mechanisms have been proposed via a 1,5-HAT process followed by Lewis acid-controlled
The invention provides certain bis-acylated hydroxylamine derivative compounds, pharmaceutical compositions and kits comprising such compounds, and methods of using such compounds or pharmaceutical compositions. In particular, the invention provides methods of using such compounds or pharmaceutical compositions for treating, preventing, or delaying the onset and/or develop of a disease or condition. In some embodiments, the disease or condition is selected from cardiovascular diseases, ischemia, reperfusion injury, cancerous disease, pulmonary hypertension and conditions responsive to nitroxyl therapy.
Regioselective Radical Arene Amination for the Concise Synthesis of <i>ortho</i>-Phenylenediamines
作者:James E. Gillespie、Charlotte Morrill、Robert J. Phipps
DOI:10.1021/jacs.1c05531
日期:2021.6.30
relevant diazoles. Our method can deliver both free amines and monoalkyl amines allowing access to unsymmetrical, selectively monoalkylated benzimidazoles and benzotriazoles. As well as providing concise access to valuable ortho-phenylenediamines, this work demonstrates the potential for utilizing noncovalent interactions to control positional selectivity in radical reactions.
Irreversible Conjugation of Aldehydes in Water To Form Stable 1,2,4-Oxadiazinan-5-ones
作者:Alexandre F. Trindade、Jeffrey W. Bode
DOI:10.1021/acs.orglett.6b01889
日期:2016.9.2
A new, irreversible aldehyde conjugation reaction in aqueous media was developed. α-Aminooxy acetohydrazides undergo irreversible condensation reactions with aliphatic, aromatic, or unsaturated aldehydes and isatins in a mixture of acetonitrile and acetate buffer at pH 4 to yield 1,2,4-oxadiazinan-5-one heterocycles in excellent isolated yields (40–99%). This class of heterocycles proved to be hydrolytically
preparation of N-CF3 compounds through fluorination and trifluoromethylation of N-containing compounds. The development of new synthetic methods from abundant and easily available substrates is highly desirable but still challenging. Herein, we report the design and synthesis of novel N-Cbz- and N-Boc-N-trifluoromethyl hydroxylamine reagents by silver-mediated oxidative trifluoromethylation. These reagents