n-Butylammonium carboxylates/Tf2O: ionic liquid based systems for the synthesis of unsymmetrical imides via a Ritter-type reaction
摘要:
We have developed a new method for the preparation of unsymmetrical imides using liquid carboxylate salts via a Ritter-type process. The reactions were carried out with nitriles and n-butylammonium carboxylates as ionic liquids in the presence of triflic anhydride (Tf2O) as the promoter. Mild reaction conditions, simplicity of the procedure, and proton-free conditions are the main advantages of this procedure. (C) 2012 Elsevier Ltd. All rights reserved.
[EN] PROCESS FOR PREPARING (R)-2-ACETAMIDO-N-BENZYL-3-METHOXY-PROPIONAMIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE (R)-2-ACÉTAMIDO-N-BENZYL-3-MÉTHOXYPROPIONAMIDE
申请人:MSN LAB LTD
公开号:WO2011099033A1
公开(公告)日:2011-08-18
Processes for preparing and purifying (R)-2-acetamido-N-benzyl-3-methoxy- propionamide of formula-1 and intermediates thereof are provided.
[EN] 7-OXO-6-(SULFOOXY)-1,6-DIAZABICYCLO[3.2.1]OCTANE-2-CARBOXAMIDE CONTAINING COMPOUNDS AND THEIR USE IN TREATING BACTERIAL INFECTIONS<br/>[FR] COMPOSÉS CONTENANT DU 7-OXO-6-(SULFO-OXY)-1,6-DIAZABICYCLO[3.2.1]OCTANE-2-CARBOXAMIDE ET LEUR UTILISATION DANS LE TRAITEMENT D'INFECTIONS BACTÉRIENNES
申请人:WOCKHARDT LTD
公开号:WO2017098425A1
公开(公告)日:2017-06-15
Compounds of Formula (I), their preparation, and use in preventing or treating a bacterial infection are disclosed. (I)
化合物的公式(I),它们的制备以及在预防或治疗细菌感染中的用途被披露。(I)
Process for the synthesis of azetidinones
申请人:Thiruvengadam K. Tiruvettipuram
公开号:US20060135755A1
公开(公告)日:2006-06-22
A process is provided for preparing azetidinones useful as intermediates in the synthesis of penems and as hypocholesterolemic agents, comprising reacting a β-(substituted-amino)amide, a β-(substituted-amino)acid ester, or a β-(substituted-amino)thiolcarbonic acid ester with a silylating agent and a cyclizing agent selected from the group consisting of alkali metal carboxylates, quaternary ammonium carboxylates, quaternary ammonium hydroxides, quaternary ammonium alkoxides, quaternary ammonium aryloxides and hydrates thereof, or the reaction product of: (i) at least one quaternary ammonium halide and at least one alkali metal carboxylate; or (ii) at least one quaternary ammonium chloride, quaternary ammonium bromide, or quaternary ammonium iodide and at least one alkali metal fluoride, wherein a quaternary ammonium moiety of the cyclizing agent is unsubstituted or substituted by one to four groups independently selected from the group consisting of alkyl, arylalkyl and arylalkyl-alkyl.
[EN] 7-OXO -6-(SULFOOXY)- 1,6-DIAZABICYCLO [3.2.1] OCTANE CONTAINING COMPOUNDS AND THEIR USE IN TREATMENT OF BACTERIAL INFECTIONS<br/>[FR] 7-OXO-6-(SULFOOXY)-1,6-DIAZABICYCLO[3.2.1] OCTANE CONTENANT DES COMPOSÉS ET LEUR UTILISATION DANS LE TRAITEMENT D'INFECTIONS BACTÉRIENNES
申请人:WOCKHARDT LTD
公开号:WO2017081615A1
公开(公告)日:2017-05-18
Compounds of Formula (I) or a stereoisomer or a pharmaceutically acceptable salt thereof, their preparation, and use in treating a bacterial infection are disclosed.
化合物的公式(I)或其立体异构体或药学上可接受的盐,其制备以及在治疗细菌感染中的用途被披露。
One-pot synthesis of N-allylthioureas using supported reagents
A simple and efficient method has been developed for the synthesis of N-allylthioureas from allylic bromides in one-pot by using a supported reagents system, KSCN/SiO2–RNH3OAc/Al2O3, in which allyl bromide reacts first with KSCN/SiO2 and the product, allyl isothiocyanate, reacts with RNH3OAc/Al2O3 to give the final product, N-allylthiourea, in good yield.
通过使用支持的试剂系统KSCN / SiO 2 -RNH 3 OAc / Al 2 O 3,由一锅法从烯丙基溴中合成N-烯丙基硫脲的简单有效方法已被开发,其中烯丙基溴首先与KSCN / SiO 2和产物异硫氰酸烯丙酯与RNH 3 OAc / Al 2 O 3反应,以高收率得到最终产物N-烯丙基硫脲。