Johnbull O. Echeme

Isolation and Characterization of Zygadenine- N- ribofuranoside from the Leaves of Nymphaea alba Lily

Peter Chidi Njoku, Johnbull O. Echeme, Rosemary I. Uchegbu & Emeka C. Ogoko · Chemical Science International Journal · 2016

Aims: To isolate and characterize a new secondary metabolite, zygadenine-N-ribofuranoside derivative from the leaves of water lily (Nymphaeae alba L.). Methodology: The ethanol extract of the dried leaves was partitioned between chloroform and water (1:1), then the chloroform fra...

Open access Research Article 10.9734/ACSJ/2016/19929

Synthesis and Antibacterial Activity of N,N-Diethylamide Bearing Benzenesulfonamide Derivatives

Olayinka O. Ajani, Oluwole B. Familoni, Johnbull O. Echeme, Feipeng Wu & Zheng Sujiang · Chemical Science International Journal · 2013

Sulfonamides are known to represent a class of medicinally important compounds which are extensively used as antibacterial agents. Hence, a series of new N,N-diethyl amide bearing sulfonamides (2a-k) were synthesized via amidation of easily prepared benzenesulfonamide precursors...

Open access Research Article 10.9734/ACSJ/2013/2397