A new class of phosphoinositide-dependent kinase-1 (PDK-1) inhibitors of Formula I:wherein X wherein X is —CF3, Ar is selected fromand R is selected fromwhere R′ is L-Lys, D-Lys, β-Ala, L-Lue, L-Ile, Phe, SO2CH2CH2NH2, SO2NH2, Asn, Glu or Gyl, and R″ is methyl, ethyl, allyl, CH2CH2OH, CH2CN, CH2CH2CN, CH2CONH2,