Rhodium(III)-Catalyzed Directed C−H Amidation of <i>N</i>
-Nitrosoanilines and Subsequent Formation of 1,2-Disubstituted Benzimidazoles
作者:Yanyu Chen、Rong Zhang、Qiujun Peng、Lanting Xu、XianHua Pan
DOI:10.1002/asia.201701287
日期:2017.11.2
An efficient rhodium‐catalyzeddirectC−Hamidation of N‐nitrosoanilines with 1,4,2‐dioxazol‐5‐ones as amidating agents has been developed. This method featured mild reaction conditions, a wide substrate scope and satisfactory yields. Besides, the amidated products could be readily converted to pharmaceutically valuable 1,2‐disubstituted benzimidazoles via an HCl‐mediated deprotection/cyclization process
Light-Induced Ruthenium-Catalyzed Nitrene Transfer Reactions: A Photochemical Approach towards N-Acyl Sulfimides and Sulfoximines
作者:Vincent Bizet、Laura Buglioni、Carsten Bolm
DOI:10.1002/anie.201310790
日期:2014.5.26
photochemical conditions, thus yielding N‐acyl nitrenes. Described herein is a light‐induced ruthenium‐catalyzed N‐acyl nitrenetransfer to sulfides and sulfoxides by decarboxylation of 1,4,2‐dioxazol‐5‐ones at room temperature, thus providing direct access to N‐acyl sulfimides and sulfoximines under mild reaction conditions. In addition, a one‐pot sulfurimidation/oxidation sequence catalyzed by a single
Sulfur Imidations by Light-Induced Ruthenium-Catalyzed Nitrene Transfer Reactions
作者:Vincent Bizet、Carsten Bolm
DOI:10.1002/ejoc.201500220
日期:2015.5
N-Acyl nitrenes have been generated from a range of heterocyclic precursors, and their applications in light-inducedruthenium-catalyzedsulfurimidations have been studied. Analyzing the reaction scope and determining the structural requirements of the in situ formed electrophilic nitrogen species for effective nitrenetransfer allowed a mechanistic scheme to be proposed. The mechanistic conclusions
One of the active principles of Amanita muscaria, 5-aminomethyl-3-hydroxyisoxazole (I) has been synthesised from 3-bromo-5-methylisoxazole by way of 3-methoxyisoxazole-5-acetic acid (XIII), and from 3-methoxyisoxazole-5-carboxylic acid (XXa) by reduction of its amide with diborane. Analogues of (I) with methyl and ethyl substituents in the 4-position have been prepared similarly from 3-hydroxy-4,5-dimethylisoxazole
Use of organophosphorous compounds for producing a medicament for treating infections
申请人:——
公开号:US20030144249A1
公开(公告)日:2003-07-31
The invention relates to the use of organophosphorus compounds of the general formula (I)
1
wherein B is selected from the group which consists of group
2
and group
R
1
—N═A— (III)
and wherein A is selected from the group which consists of an alkyleneamine residue, an alkenyleneamine residue, a hydroxyalkyleneamine residue, an alkyleneimine residue, an alkenyleneimine residue and a hydroxyalkyleneimine residue, wherein the nitrogen atom is located in the chain which links the phosphorus atom with the nitrogen atom of the group
3
or group R
1
—N═, for the therapeutic and prophylactic treatment of infections in humans and animals caused by viruses, bacteria, fungi and parasites and pharmaceutical preparations which contain these compounds as the active ingredient, and to the use thereof as a fungicide, bactericide and herbicide in plants.