An Alternative Method for the Synthesis of γ-Lactones by Using Cesium Fluoride-Celite/Acetonitrile Combination
摘要:
A variety of 2-(1-bromoalkyl) benzoic acids 4 undergo intramolecular nucleophilic substitution reaction when treated with a CsF-Celite as solid base in acetonitrile under reflux condition to give the corresponding cyclized phthalides in moderate to very good yield. These 2-(1-bromoalkyl) benzoic acids 4 are formed by the alpha-bromination of 2-alkylbenzoic acids 3 using N-bromosuccinimide and a catalytic amount of alpha,alpha'-azoisobutyronitrile in carbon tetrachloride under reflux.
An Alternative Method for the Synthesis of γ-Lactones by Using Cesium Fluoride-Celite/Acetonitrile Combination
摘要:
A variety of 2-(1-bromoalkyl) benzoic acids 4 undergo intramolecular nucleophilic substitution reaction when treated with a CsF-Celite as solid base in acetonitrile under reflux condition to give the corresponding cyclized phthalides in moderate to very good yield. These 2-(1-bromoalkyl) benzoic acids 4 are formed by the alpha-bromination of 2-alkylbenzoic acids 3 using N-bromosuccinimide and a catalytic amount of alpha,alpha'-azoisobutyronitrile in carbon tetrachloride under reflux.
[EN] METHODS FOR SYNTHESIZING 3-(SUBSTITUTED DIHYDROISOINDOLINONE-2-YL)-2,6-DIOXOPIPERIDINE, AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉS POUR LA SYNTHÈSE DE 3-[(DIHYDROISOINDOLINONE SUBSTITUÉE)-2-YL]-2,6-DIOXOPIPÉRIDINE ET INTERMÉDIAIRES CORRESPONDANTS
申请人:NANJING CAVENDISH BIO ENGINEERING TECHNOLOGY CO LTD
公开号:WO2010139266A1
公开(公告)日:2010-12-09
The present invention discloses methods for synthesizing 3-(substituted dihydroisoindolinone-2-yl)-2,6-dioxopiperidine and intermediates thereof, namely, the synthesis of compounds of the Formula (I), with each substitutional group defined in the patent specification. Owing to the advantages of high productivity, little influence to the environment and material accessibility, the methods of the present invention is suitable for industrial production.
Compounds of the formula I:
or pharmaceutically acceptable salts thereof, wherein the variables are as defined herein. Also disclosed are methods of making the compounds and using the compounds for treatment of diseases associated with the P2X7 purinergic receptor.
[EN] ANHYDROUS LENALIDOMIDE FORM-I<br/>[FR] FORME I DE LÉNALIDOMIDE ANHYDRE
申请人:NATCO PHARMA LTD
公开号:WO2011111053A1
公开(公告)日:2011-09-15
Anhydrous polymorphic form-I of anti cancer drug, Lenalidomide whose chemical name is 3-(4-amino-1-oxo-1, 3-dihydro-isoindole-2-yl)-piperidine-2, 6-dione, is disclosed. Alternate methods for making anhydrous polymorphic form-I of Lenalidomide are also disclosed.
Substituted 2-(2,6-dioxopiperidin-3-yl)-phthalimides and 1-oxoisoindolines and method of reducing TNF alpha levels
申请人:CELGENE CORPORATION
公开号:EP2859895A1
公开(公告)日:2015-04-15
Substituted 2-(2,6-dioxopiperidin-3-yl)phthalimides and 1-oxo-2-(2,6-dioxopiperidin-3-yl)isoindolines reduce the levels of TNFα in a mammal. Typical embodiments are 1-oxo-2-(2,6-dioxo-3-methylpiperidin-3-yl)-4,5,6,7-tetrafluoroisoindoline and 1,3-dioxo-2-(2,6-dioxo-3-methylpiperidin-3-yl)-4-aminoisoindoline.
Anhydrous polymorphic form-I of anti cancer drug, Lenalidomide whose chemical name is 3-(4-amino-1-oxo-1,3-dihydro-isoindole-2-yl)-piperidine-2,6-dione, is disclosed. Alternate methods for making anhydrous polymorphic form-I of Lenalidomide are also disclosed.