A new library of different substituted aryl derivatives of isoxazole-pyrazolo[1,5-a]pyrimidine I [R = 4-Me, 4-Cl, 3,5-diMeO, etc.] were prepared, confirmed their structures by 1HNMR, 13CNMR and mass spectral data.Furthermore, the preliminary anticancer activities of newly developed compounds I were tested against four human cancer cell lines PC3 (prostate), DU-145 (Prostate), A549 (lung) and MCF-7 (breast) by utilizing of MTT method.The obtained results of were compared with standard reference etoposide.Among all, compounds I [R = 3,4,5-triMeO, 3,5-diMeO, 4-MeO, 4-Me-3,5-diNO2, 4-Me, 4-NMe2] displayed highest anticancer activities than standardPredominantly, one compound I [R = 3,4,5-triMeO] with 3,4,5-trimethoxy substituent on the aryl ring showed excellent activity.The mol. modeling studies indicated the interactions of synthesized compounds with SARM, and DNA via hydrogen bonds and hydrophobic interactions.