PROCESS FOR THE PREPARATION OF N-SUBSTITUTED CARBAMIC ACID ESTER AND PROCESS FOR THE PREPARATION OF ISOCYANATE USING THE N-SUBSTITUTED CARBAMIC ACID ESTER
(4-Arylsulfamoyl)phenylcarbamic acid esters: I. Synthesis and activity against herpes viruses
作者:V. I. Krutikov、A. V. Erkin、V. V. Tets、A. A. Shmarov
DOI:10.1134/s1070363216070069
日期:2016.7
Aiming to modify the biological activity of sulfonamides, a number of alkyl (4-arylsulfamoyl)- phenylcarbamates were prepared in 50–70% yield. Biological screening showed that the target compounds possessed a high activity against herpes viruses as well as a traditional antibiotic one.
The directcatalyticsynthesis of carbamates from CO2, amines and methanol was achieved by controlling both the reaction equilibrium and the reactivity of the three components. The combination of CeO2 and 2‐cyanopyridine was an effective catalyst, providing various carbamates including N‐arylcarbamates in high selectivities.
A novel Mitsunobu -based protocol was developed for the synthesis of carbamates from the corresponding alcohols using carbon dioxide and amines in good to excellent yields. This protocol is mild, chemoselective, and efficient compared to other reported methods.
Selenium-Catalyzed Oxidative Carbonylation of Aniline and Alcohols to <i>N</i>-Phenylcarbamates
作者:Xiaopeng Zhang、Huanzhi Jing、Guisheng Zhang
DOI:10.1080/00397910903134626
日期:2010.5.11
A facile one-pot, phosgene-free synthesis of N-phenylcarbamates is demonstrated. Catalyzed by selenium, oxidative carbonylation of aniline with alcohols in the presence of carbonmonoxide and oxygen affords the corresponding N-phenylcarbamates, mostly in fair to good yields. Selenium can be easily recovered because of its phase-transfer catalysis function.
A new lipase, Ndbn, capable of efficiently catalyzing the amidation between esters and aromatic amines which are weak nucleophilic reagents was discovered. Furthermore, Ndbn exhibits the capability to catalyze the aminolysis of carboxylic acids without the need for preparing ester substrate or a strictly anhydrous reaction environment. Additionally, an unusual preference of Ndbn for aromatic amines