[EN] MANGANESE BASED COMPLEXES AND USES THEREOF FOR HOMOGENEOUS CATALYSIS<br/>[FR] COMPLEXES À BASE DE MANGANÈSE ET LEURS UTILISATIONS SERVANT À UNE CATALYSE HOMOGÈNE
申请人:YEDA RES & DEV
公开号:WO2017137984A1
公开(公告)日:2017-08-17
The present invention relates to novel manganese complexes and their use, inter alia, for homogeneous catalysis in (1) the preparation of imine by dehydrogenative coupling of an alcohol and amine; (2) C-C coupling in Michael addition reaction using nitriles as Michael donors; (3) dehydrogenative coupling of alcohols to give esters and hydrogen gas (4) hydrogenation of esters to form alcohols (including hydrogenation of cyclic esters (lactones) or cyclic di-esters (di- lactones), or polyesters); (5) hydrogenation of amides (including cyclic dipeptides, lactams, diamide, polypeptides and polyamides) to alcohols and amines (or diamine); (6) hydrogenation of organic carbonates (including polycarbonates) to alcohols or hydrogenation of carbamates (including polycarbamates) or urea derivatives to alcohols and amines; (7) dehydrogenation of secondary alcohols to ketones; (8) amidation of esters (i.e., synthesis of amides from esters and amines); (9) acylation of alcohols using esters; (10) coupling of alcohols with water and a base to form carboxylic acids; and (11) preparation of amino acids or their salts by coupling of amino alcohols with water and a base. (12) preparation of amides (including formamides, cyclic dipeptides, diamide, lactams, polypeptides and polyamides) by dehydrogenative coupling of alcohols and amines; (13) preparation of imides from diols.
A general study of the iron‐catalyzedreaction of urea with nucleophiles is here presented. The carbamoylation of alcohols allows for the synthesis of N‐unsubstituted (primary) carbamates, including present drugs (Felbamate and Meprobamate), without the necessity to apply phosgene and related derivatives. Using amines as nucleophiles gave rise to the respective mono‐ and disubstituted ureas via selective
Superparamagnetic Fe<sub>3</sub>
O<sub>4</sub>
Nanoparticles in a Deep Eutectic Solvent: An Efficient and Recyclable Catalytic System for the Synthesis of Primary Carbamates and Monosubstituted Ureas
Superparamagnetic Fe3O4 nanoparticles were used to prepare primary carbamates as well as monosubstituted and N,N‐disubstituted ureas. This efficient phosgene‐free process used urea as an eco‐friendly carbonyl source in the presence of a biocompatible deep eutectic solvent (DES) to provide an inexpensive and attractive route that afforded the products in moderate to excellent yields. (MNP = magnetite nanoparticles
超顺磁性Fe 3 O 4纳米颗粒用于制备氨基甲酸酯以及单取代的和N,N-二取代的脲。这种有效的无光气工艺在生物相容性深共熔溶剂(DES)的存在下将尿素用作环保的羰基来源,从而提供了一种廉价且有吸引力的途径,使产品收率适中至优异。(MNP =磁铁矿纳米颗粒,Ch =胆碱)
2-amino-4,5-disubstituted-oxazole/thiazole compounds as herbicide
申请人:Monsanto Company
公开号:US05000775A1
公开(公告)日:1991-03-19
2-Amino-4,5-disubstituted-oxazole/thiazole compounds and antidotes for thiocarbamate, triazine and acetamide herbicides. These antidote compounds are especially effective to safen acetamide herbicides used to control grassy weeds in sorghum and broadleaf weeds in corn.
Process for the preparation of asymmetrically substituted ureas
申请人:Chemie Linz Gesellschaft m.b.H.
公开号:US05043444A1
公开(公告)日:1991-08-27
Process for the preparation of asymmetrically substituted ureas by reaction of a gaseous mixture of isocyanic acid and ammonia having a temperature of 260.degree. to 600.degree. C. with a primary or secondary amine.