Synthesis and Antimalarial Bioassay of Quinine - Peptide Conjugates
作者:Siva S. Panda、Mohamed A. Ibrahim、Hasan Küçükbay、Marvin J. Meyers、Francis M. Sverdrup、Said A. El-Feky、Alan R. Katritzky
DOI:10.1111/cbdd.12134
日期:2013.10
Amino acid and peptide conjugates of quinine were synthesized using microwave irradiation in 52–95% yields using benzotriazole methodology. The majority of these conjugates retain in vitro antimalarial activity with IC50 values below 100 nm, similar to quinine.
使用苯并三唑方法,使用微波辐射以52–95%的产率合成奎宁的氨基酸和肽共轭物。这些结合物中的大多数保留体外抗疟活性,IC 50值低于100 n m,类似于奎宁。
An improved route for the synthesis of Rolloamide B
作者:Mohamed Elagawany、Mohamed A. Ibrahim
DOI:10.1016/j.tetlet.2016.07.044
日期:2016.8
A high yielding method for the synthesis of the cyclic heptapeptide Rolloamide B has been described. An effective isobutyl chloroformate (IBCF) mediated direct coupling reaction was introduced to improve the synthetic route towards Rolloamide B. Furthermore, preliminary bioassays indicated potential activity against Gram-negative bacteria and fungi.
Amino Acyl Conjugates of Nitrogen Heterocycles as Potential Pharmacophores
作者:Alan R. Katritzky、Kiran Bajaj、Mael Charpentier、Ebrahim Ghazvini Zadeh
DOI:10.1021/jo100625y
日期:2010.6.4
2-Methyl- and 4-methylpyridine and 2-methylquinoline are converted by benzotriazole-activated (Cbz)-protected amino acids into chiral potential novel pharmacophore aminoacyl conjugates (33-53%).
A benzotriazole-mediated route to protected marine-derived hetero-2,5-diketopiperazines containing proline
作者:Olivier Nsengiyumva、Sadra Hamedzadeh、James McDaniel、Jocelyn Macho、Grant Simpson、Siva S. Panda、Khanh Ha、Iryna Lebedyeva、Hassan M. Faidallah、Manal Metgen AL-Mohammadi、C. Dennis Hall、Alan R. Katritzky
DOI:10.1039/c5ob00023h
日期:——
Dipeptidoyl benzotriazolides containing proline were cyclized by triethylamine into 2,5-diketopiperazines.