<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A base‐induced cyclization of 1, 3, 5‐triphenylpentane‐1, 5‐diones and 3‐pyrazolamines affords 5, 7‐diphenylpyrazolo[1, 5‐a]pyrimidines in good yields via C—C bond cleavage.</p> </abstract>