Pyrvinium (Viprynium) is an anthelmintic effective for pinworms. Several forms of pyrvinium have been prepared with variable counter anions, such as

halide In chemistry, a halide (rarely halogenide) is a binary chemical compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative (or more electropositive) than the halogen, to make a fluor ...

s, tosylate, triflate and

pamoate Pamoic acid, also called embonic acid, is a 2-Naphthoic acid derivative. Salts and esters of pamoic acid are known as pamoates or embonates. It can be prepared by the reaction of 3-hydroxy-2-naphthoic acid with formaldehyde. In pharmacology ...

. Pyrvinium was identified as a potent Wnt inhibitor, acting through activation of Casein kinase CK1α. Pyrvinium salts can also inhibit the growth of cancer cells. More specifically, the pamoate salt has been shown to have preferential toxicity for various cancer cell lines during glucose starvation.

Synthesis

One synthetic method is based on Skraup synthesis and Paal-Knorr synthesis. More recently, an alternative convergent, synthetic strategy to pyrvinium triflate salts through Friedländer synthesis was reported.

References

Anthelmintics Pyrroles Quinolines Quaternary ammonium compounds {{antiinfective-drug-stub