Modification and Optimization of the Bis-picolylamide-Based Relay Protection for Carboxylic Acids to be Cleaved by Unusual Complexation with Cu2+ Salts
摘要:
A simple modification of our recently published protection scheme for carboxylic acids as amides resulted in a new protecting group with significantly improved properties. It requires shorter reaction times for deprotection and allows us to replace Cu(OTf)(2) by CuCl2, indicating at the same time the importance of the nature of the anion of the Cu2+ source. Since the new scheme fulfills all criteria required for an ideal protection group it should find widespread application in synthetic organic chemistry.
Modification and Optimization of the Bis-picolylamide-Based Relay Protection for Carboxylic Acids to be Cleaved by Unusual Complexation with Cu2+ Salts
摘要:
A simple modification of our recently published protection scheme for carboxylic acids as amides resulted in a new protecting group with significantly improved properties. It requires shorter reaction times for deprotection and allows us to replace Cu(OTf)(2) by CuCl2, indicating at the same time the importance of the nature of the anion of the Cu2+ source. Since the new scheme fulfills all criteria required for an ideal protection group it should find widespread application in synthetic organic chemistry.
[EN] HETEROCYCLIC COMPOUNDS, MEDICAMENTS CONTAINING SAID COMPOUNDS, USE THEREOF AND PROCESSES FOR THE PREPARATION THEREOF<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES, MÉDICAMENTS CONTENANT LESDITS COMPOSÉS, UTILISATION DE CEUX-CI ET PROCÉDÉS POUR LA PRÉPARATION DE CEUX-CI
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2013092674A1
公开(公告)日:2013-06-27
The present invention relates to compounds of general formula (I) and the tautomers and the salts thereof, particularly the pharmaceutically acceptable salts thereof with inorganic or organic acids and bases, which have valuable pharmacological properties, particularly an inhibitory effect on epithelial sodium channels, the use thereof for the treatment of diseases, particularly diseases of the lungs and airways.
HETEROCYCLIC COMPOUNDS, MEDICAMENTS CONTAINING SAID COMPOUNDS, USE THEREOF AND PROCESSES FOR THE PREPARATION THEREOF
申请人:Boehringer Ingelheim International GmbH
公开号:EP2794595B1
公开(公告)日:2017-08-02
Modification and Optimization of the Bis-picolylamide-Based Relay Protection for Carboxylic Acids to be Cleaved by Unusual Complexation with Cu<sup>2+</sup> Salts
A simple modification of our recently published protection scheme for carboxylic acids as amides resulted in a new protecting group with significantly improved properties. It requires shorter reaction times for deprotection and allows us to replace Cu(OTf)(2) by CuCl2, indicating at the same time the importance of the nature of the anion of the Cu2+ source. Since the new scheme fulfills all criteria required for an ideal protection group it should find widespread application in synthetic organic chemistry.