The reaction of a carboxylicacid or an ester with an amine to give the corresponding amide was carried out efficiently over hydrous zirconium(IV) oxide, whether in the vapor phase or in the liquid phase.
An efficient catalytic method for the Beckmann rearrangement of ketoximes to amides and aldoximes to nitriles mediated by propylphosphonic anhydride (T3P®)
作者:John Kallikat Augustine、Rajesha Kumar、Agnes Bombrun、Ashis Baran Mandal
DOI:10.1016/j.tetlet.2010.12.090
日期:2011.3
An efficient method for the Beckmannrearrangement of ketoximes to amides mediated by a catalytic amount (15 mol %) of propylphosphonic anhydride (T3P®) is described. Aldoximes underwent secondorderBeckmannrearrangement to provide the corresponding nitriles in excellent yields on reacting with T3P (15 mol %) at room temperature. The main advantages of this environmentally friendly protocol include
A mild and efficient reaction for conversion of carboxylic acids into acid bromides with ethyl tribromoacetate/triphenylphosphine under acid-free conditions
作者:Dong Ho Kang、Tae Young Joo、Eun Hwa Lee、Skaydaw Chaysripongkul、Warinthorn Chavasiri、Doo Ok Jang
DOI:10.1016/j.tetlet.2006.06.013
日期:2006.8
Acid bromides were prepared efficiently from carboxylic acids with readily available ethyl tribromoacetate and triphenylphosphine at room temperature under neutral conditions. The present process is applicable to the preparation of various acid bromides from aromatic and aliphatic carboxylic acids. Aromatic carboxylic acids were found to be more reactive than aliphatic carboxylic acids under reaction
TYROSINE AMIDE DERIVATIVES AS RHO- KINASE INHIBITORS
申请人:CHIESI FARMACEUTICI S.P.A.
公开号:US20180215758A1
公开(公告)日:2018-08-02
Bicyclic dihydropyrimidine-carboxamide compounds of formula I described herein inhibit Rho Kinase and may be used for the treatment of many disorders associated with ROCK enzymes mechanisms, such as pulmonary diseases including asthma, chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF) and pulmonary arterial hypertension (PAH).