Carbamate compounds having a structure represented by formula I (where R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined herein) are useful as anti-tumor agents.
Regioselective Formal [3+2] Cycloadditions of Urea Substrates with Activated and Unactivated Olefins for Intermolecular Olefin Aminooxygenation
作者:Fan Wu、Nur‐E Alom、Jeewani P. Ariyarathna、Johannes Naß、Wei Li
DOI:10.1002/anie.201904662
日期:2019.8.19
A new class of intermolecular olefin aminooxygenation reaction is described. This reaction utilizes the classic halonium intermediate as a regio‐ and stereochemical template to accomplish the selective oxyamination of both activated and unactivated alkenes. Notably, urea chemical feedstock can be directly introduced as the N and O source and a simple iodide salt can be utilized as the catalyst. This
Enzyme-Inspired Lysine-Modified Carbon Quantum Dots Performing Carbonylation Using Urea and a Cascade Reaction for Synthesizing 2-Benzoxazolinone
作者:Morteza Hasani、Hamid R. Kalhor
DOI:10.1021/acscatal.1c01276
日期:2021.9.3
desirable condition without using tedious and toxic workup processes at a low temperature (37 °C for aliphatic amines and 60 °C for aniline derivatives), as well as by embracing the broad scope of products in good to high yields even with weak nucleophiles such as aniline. A proposed acid-activated mechanism was suggested for the model reaction that was further confirmed by detecting ammonia as the leaving
Ammonium Chloride‐Promoted Rapid Synthesis of Monosubstituted Ureas under Microwave Irradiation
作者:Chunling Blue Lan、Karine Auclair
DOI:10.1002/ejoc.202101059
日期:2021.10.7
Ammonium chloride promotes the selective formation of monosubstituted ureas undermicrowaveirradiation. Most nucleophiles, acid-labile functionalities, and protecting groups are well tolerated in this reaction. By avoiding transition metals and mineral acids, this methodology offers a more sustainable alternative for the synthesis of monosubstituted ureas and their analogs.
OXOPIPERIDINE DERIVATIVES, PREPARATION AND THERAPEUTIC USE THEREOF
申请人:Braun Alain
公开号:US20070149562A1
公开(公告)日:2007-06-28
The present invention relates to compounds of formula (I) as defined herein that are melanocortin receptor agonists, to the preparation thereof and to the therapeutic use thereof in the treatment or prevention of a condition selected from obesity, diabetes and sexual dysfunctions that can affect both sexes, in the treatment of cardiovascular diseases, and also in anti-inflammatory uses or in the treatment of alcohol dependency.