Synthesis and analgesic activities of urea derivatives of α-amino-N-pyridyl benzene propanamide
摘要:
New urea L-phenyl alanine derivatives of 4-aminopyridine have been synthesized and evaluated for analgesic activity with the PBQ writhing test in mice and the Randall-Selitto test in rats. Potent oral activity (ID50 < 10 mg/kg) and good tolerance were found in alkyl, arylalkyl and carboxyalkyl urea derivatives. The analgesic activity was found to be totally dependent on the pyridine moiety and was at least partly inhibited by pretreatment with (alpha) methyltyrosine, as was the case for 4-aminopyridine. These compounds are therefore pharmacologically interesting as new analgesic derivatives of 4-aminopyridine. They have a higher oral activity and a better activity/tolerance profile.
Copper-Catalyzed Direct C(sp<sup>3</sup>)–H Alkoxylation to Access Quaternary α-Alkoxylated Amino Acid Derivatives
作者:Qiang Wei、Yao Ma、Yi Dong、Gang Liu
DOI:10.1021/acs.orglett.0c01853
日期:2020.8.7
prepare quaternary α-alkoxylated aminoacidderivatives in good yields. This protocol can be applied to a series of α-amino acids bearing a variety of functional group substituents. Facile removal of the auxiliary directing group and tolerance of condensation conditions for amide bond formation enable the potential application of this method in the discovery of new peptide drugs in the future.