Synthesis and antischistosomal activity of certain pyrazolo[1,5-a]pyrimidines. 1981

K Senga, and T Novinson, and H R Wilson, and R K Robins

Several 7-hydroxypyrazolo[1,5-a]pyrimidines (1-21), 7-mercaptopyrazolo[1,5-a]pyrimidines (37-49), and 4-alkylpyrazolo[1,5-a]pyrimidin-7-ones (50-55) and the corresponding 4-alkylpyrazolo[1,5-a]pyrimidine-7-thiones (56-60) were synthesized and tested for antischistosomal activity against Schistosoma mansoni. Of the compounds examined, the greatest degree of activity in vitro was found with the 7-mercaptopyrazolo[1,5-a]pyrimidines. In particular, compounds 37 and 47 proved lethal at 100 micrograms/mL after an exposure of only 1 h. The 7-hydroxypyrazolo[1,5-a]-pyrimidines were not as active. None of the compounds exhibiting in vitro activity were active against S. mansoni in vivo.

UI MeSH Term Description Entries
D011720 Pyrazoles Azoles of two nitrogens at the 1,2 positions, next to each other, in contrast with IMIDAZOLES in which they are at the 1,3 positions.
D011743 Pyrimidines A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of forms. They include several nucleic acid constituents (CYTOSINE; THYMINE; and URACIL) and form the basic structure of the barbiturates.
D002621 Chemistry A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange.
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012550 Schistosoma mansoni A species of trematode blood flukes of the family Schistosomatidae. It is common in the Nile delta. The intermediate host is the planorbid snail. This parasite causes schistosomiasis mansoni and intestinal bilharziasis. Schistosoma mansonus,mansonus, Schistosoma
D012556 Schistosomicides Agents that act systemically to kill adult schistosomes. Antischistosomal Agent,Antischistosomal Agents,Schistosomicide,Agent, Antischistosomal,Agents, Antischistosomal
D055598 Chemical Phenomena The composition, structure, conformation, and properties of atoms and molecules, and their reaction and interaction processes. Chemical Concepts,Chemical Processes,Physical Chemistry Concepts,Physical Chemistry Processes,Physicochemical Concepts,Physicochemical Phenomena,Physicochemical Processes,Chemical Phenomenon,Chemical Process,Physical Chemistry Phenomena,Physical Chemistry Process,Physicochemical Phenomenon,Physicochemical Process,Chemical Concept,Chemistry Process, Physical,Chemistry Processes, Physical,Concept, Chemical,Concept, Physical Chemistry,Concept, Physicochemical,Concepts, Chemical,Concepts, Physical Chemistry,Concepts, Physicochemical,Phenomena, Chemical,Phenomena, Physical Chemistry,Phenomena, Physicochemical,Phenomenon, Chemical,Phenomenon, Physicochemical,Physical Chemistry Concept,Physicochemical Concept,Process, Chemical,Process, Physical Chemistry,Process, Physicochemical,Processes, Chemical,Processes, Physical Chemistry,Processes, Physicochemical

Related Publications

K Senga, and T Novinson, and H R Wilson, and R K Robins
September 1979, Il Farmaco; edizione scientifica,
K Senga, and T Novinson, and H R Wilson, and R K Robins
January 2023, Bioorganic & medicinal chemistry letters,
K Senga, and T Novinson, and H R Wilson, and R K Robins
September 2013, Ultrasonics sonochemistry,
K Senga, and T Novinson, and H R Wilson, and R K Robins
November 2006, Archiv der Pharmazie,
K Senga, and T Novinson, and H R Wilson, and R K Robins
January 2020, Medicinal chemistry (Shariqah (United Arab Emirates)),
K Senga, and T Novinson, and H R Wilson, and R K Robins
June 1987, Archiv der Pharmazie,
K Senga, and T Novinson, and H R Wilson, and R K Robins
December 2023, European journal of medicinal chemistry,
K Senga, and T Novinson, and H R Wilson, and R K Robins
July 2015, The Journal of organic chemistry,
K Senga, and T Novinson, and H R Wilson, and R K Robins
February 1977, Journal of medicinal chemistry,
Copied contents to your clipboard!