Concise and Efficient Access to 5,7-Disubstituted Pyrazolo[1,5-<i>a</i>]pyrimidines by Pd-Catalyzed Sequential Arylation, Alkynylation and SN<sub>Ar</sub>Reaction
A simple and efficient method for synthesis of 5,7-disubstituted pyrazolo[1,5-a]pyrimidines is reported. The syntheticroute involved first a one-pot two-step synthesis of 7-substituted pyrazolo[1,5-a]pyrimidin-5-ones from the reaction of 3-aminopyrazole 1 with activated alkynes. These compounds were used as key intermediates to access, with excellent yields, a library of new 5,7-disubstituted pyrazolo[1
The present invention is directed to, in part, fused heteroaryl compounds and compositions useful for preventing and/or treating a disease or condition relating to aberrant function of a voltage-gated, sodium ion channel, for example, abnormal late/persistent sodium current. Methods of treating a disease or condition relating to aberrant function of a sodium ion channel including Dravet syndrome or epilepsy are also provided herein.