Direct Transacylation of 2,2,2-Trihaloethyl Esters with Amines and Alcohols Using Phosphorus(III) Reagents for Reductive Fragmentation and in Situ Activation
作者:Jeremy J. Hans、Russell W. Driver、Steven D. Burke
DOI:10.1021/jo991711m
日期:2000.4.1
reductants, with resultant carboxylate activation as an acyloxyphosphonium intermediate, and in situ trapping by amine or alcohol nucleophiles. Secondary and tertiary amides were synthesized, including a dipeptide, in good yields using hexamethylphosphorous triamide (Me2N)3P, as reducing agent. Optimal yields of esters derived from primary and secondary alcohols were obtained using tributylphosphine
Efficient and accessible silane-mediated direct amide coupling of carboxylic acids and amines
作者:Melissa C. D'Amaral、Nick Jamkhou、Marc J. Adler
DOI:10.1039/d0gc02833a
日期:——
A straightforward method for the direct synthesis of amides from amines and carboxylicacids without exclusion of air or moisture using diphenylsilane with N-methylpyrrolidine has been developed. Various amides are made efficiently, and broad functional group compatibility is shown through a Glorius robustness study. A gram-scale synthesis demonstrates the scalability of this method.
[DE] VERFAHREN ZUR HERSTELLUNG VON 2-{4-[2-({[2-(4-CHLORPHENYL)-1,3-THIAZOL-4-YL]METHYL}SULFANYL)-3,5-DICYAN-6-(PYRROLIDIN-1-YL)PYRIDIN-4-YL]PHENOXY}ETHYL-L-ALANYL-L-ALANINAT-MONOHYDROCHLORID<br/>[EN] PROCESS FOR THE PREPARATION OF 2-{4-[2-({[2-(4-CHLOROPHENYL)-1,3-THIAZOL-4-YL]METHYL}SULFANYL)-3,5-DICYANO-6-(PYRROLIDIN-1-YL)PYRIDIN-4-YL]PHENOXY}ETHYL-L-ALANYL-L-ALANINATE MONOHYDROCHLORIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE MONOHYDROCHLORURE DE 2-{4-[2-({[2-(4-CHLOROPHÉNYL)-1,3-THIAZOL-4-YL]MÉTHYL}SULFANYL)-3,5-DICYAN-6-(PYRROLIDIN-1-YL)PYRIDIN-4-YL]PHÉNOXY}ÉTHYL-L-ALANYL-L-ALANINATE
申请人:BAYER PHARMA AG
公开号:WO2016188711A1
公开(公告)日:2016-12-01
Die vorliegende Anmeldung betrifft ein neues und verbessertes Verfahren zur Herstellung der Verbindung 2-4-[2-([2-(4-Chlorphenyl)-1,3-thiazol-4-yl]methyl}sulfanyl)-3,5-dicyan-6-(pyrrolidin-1-yl)pyridin-4-yl]- phenoxy}ethyl-L-alanyl-L-alaninat-Monohydrochlorid der Formel (I), neue Vorstufen zu deren Herstellung, sowie die Herstellung und Verwendung der kristallinen Modifikation I von 2-4-[2-([2-(4-Chlorphenyl)-1,3-thiazol-4-yl]methyl}sulfanyl)-3,5-dicyan-6-(pyrrolidin-1-yl)pyridin-4- yl]phenoxy}ethyl-L-alanyl-L-alaninat-Monohydrochlorid der Formel (I).