Aminopyrimidines useful as inhibitors of protein kinases

A compound of formula I:

• or a pharmaceutically acceptable salt thereof, wherein:
• Ht is
• wherein any substitutable carbon on Ht is independently and optionally substituted with —R10;
• Ring D is a 3-10 membered heterocyclyl;
• where said heterocyclyl contains 1-2 heteroatoms selected from O, N, or S;
• and wherein the heterocyclyl is independently and optionally substituted with 1-5-R5;
• Ring D is bonded to the pyrimidine via a carbon atom;
• Z1 is N, CH, or CR10;
• RX is H, halo, or C1-6alkyl, wherein the alkyl is independently and optionally substituted with 1-5 groups selected from halo, —CN, and —OR;
• RY is H, halo, C2-6alkyl, or a 5-6 membered heterocyclyl ring containing 1-2 heteroatoms selected from O, N, or S;
• wherein said RY is independently and optionally substituted with 1-4 halo, CN, OR, or C2-6alkyl;
• each R10 is independently selected from C1-6alkyl, haloC1-6alkyl, halo, OR, C(═O)R, CO2R, COCOR, NO2, CN, S(O)R, SO2R, SR, N(R4)2, CON(R4)2, SO2N(R4)2, OC(═O)R, N(R4)COR, or N(R4)CO2R;
• each R4 is independently selected from H, C1-6alkyl, or haloC1-6alkyl;
• each R5 is independently selected from halo, haloC1-6alkyl, or C1-6alkyl;
• and
• each R is independently selected from H, C1-6alkyl, or haloC1-6alkyl.