Refers to a compound of formula (i), where CONH2 R6 - or group - C (R (alpha beta) (R) (OH), in which R R alpha and beta are, independently, a hydrogen Atom, an alkyl group (C1 - C6), R is a phenyl Group R7 is an aryl or heteroaryl Group Group, among others.Preferred compounds are the 2 - ({2 - [4 - (4 - methoxy pyrrolidin-1-yl) piperidin-1-yl] phenyl] amino) - 7 - feniltieno - [3,2-d] pyrimidine 6 - carboxamide 2 - ({2 - methyl - 4 - [4 - pyrrolidin-3-yl - 1 - il) piperidin-1-yl] phenyl] amino) - 7 - feniltieno - [3,2-d] pyrimidine 6 - carboxamide, among others. It also relates to a Pharmaceutical composition that is useful in the treatment of cancer.SE REFIERE A UN COMPUESTO DE FORMULA (I), DONDE R6 ES -CONH2 O UN GRUPO-C(R ALFA)(R BETA)(OH) EN EL QUE R ALFA Y R BETA SON, INDEPENDIENTEMENTE ENTRE SI, UN ATOMO DE HIDROGENO, GRUPO ALQUILO (C1-C6) R ES UN GRUPO FENILO, R7 ES UN GRUPO ARILO O GRUPO HETEROARILO, ENTRE OTROS. SON COMPUESTOS PREFERIDOS EL 2-({2-METOXI-4-[4-PIRROLIDIN-1-IL)PIPERIDIN-1-IL]FENIL}AMINO)-7-FENILTIENO-[3,2-d]PIRIMIDIN-6-CARBOXAMIDA 2-({2-METIL-4-[4-PIRROLIDIN-1-IL)PIPERIDIN-1-IL]FENIL}AMINO)-7-FENILTIENO-[3,2-d]PIRIMIDIN-6-CARBOXAMIDA, ENTRE OTROS. SE REFIERE TAMBIEN A UNA COMPOSICION FARMACEUTICA QUE ES UTIL EN EL TRATAMIENTO DE CANCER.