A compound of formula I', wherein R 1 is selected from the group consisting of i) C 1-6 -alkyl, and ii) halogen-C 1-6 -alkyl; R 2 is selected from the group consisting of i) hydrogen, ii) halogen; iii) -NH-C(=O)-R 4, iv) heteroaryl, v) heteroaryl, substituted by 1-3 substituents individually selected from R 6, and vi) -C≡C-R 5; R 3 is halogen; R 4 is selected from the group consisting of i) heteroaryl, and ii) heteroaryl, substituted by 1-3 substituents individually selected from R 6, R 5 is selected from the group consisting of i) phenyl, ii) phenyl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, halogen-C 1-6 -alkyl and halogen iii) heteroaryl, and iv) heteroaryl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, halogen-C 1-6 -alkyl and halogen; R 6 is selected from the group consisting of i) cyano, ii) halogen; iii) C 1-6 -alkyl, iv) halogen-C 1-6 -alkyl, v) C 2-6 -alkynyl-O-, vi) heteroaryl, and vii) heteroaryl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, C 1-6 -alkoxy, halogen-C 1-6 -alkyl, halogen-C 1-6 -alkoxy and halogen; R 7 is selected from the group consisting of i) halogen, and ii) halogen-C 1-6 -alkyl; m is 1 or 2; n is 0 or 1; and p is 0, 1 or 2; or pharmaceutically acceptable salts thereof, wherein heteroaryl, alone or in combination with other groups, refers to an aromatic carbocyclic group of having a single 4 to 8 membered ring, or multiple condensed rings comprising 6 to 14 ring atoms and containing 1, 2 or 3 heteroatoms individually selected from N, O and S, in which group at least one heterocyclic ring is aromatic. R 1 is selected from the group consisting of i) C 1-6 -alkyl, and ii) halogen-C 1-6 -alkyl; i) C 1-6 -alkyl, and ii) halogen-C 1-6 -alkyl; R 2 is selected from the group consisting of i) hydrogen, ii) halogen; iii) -NH-C(=O)-R 4, iv) heteroaryl, v) heteroaryl, substituted by 1-3 substituents individually selected from R 6, and vi) -C≡C-R 5; i) hydrogen, ii) halogen; iii) -NH-C(=O)-R 4, iv) heteroaryl, v) heteroaryl, substituted by 1-3 substituents individually selected from R 6, and vi) -C≡C-R 5; R 3 is halogen; R 4 is selected from the group consisting of i) heteroaryl, and ii) heteroaryl, substituted by 1-3 substituents individually selected from R 6, i) heteroaryl, and ii) heteroaryl, substituted by 1-3 substituents individually selected from R 6, R 5 is selected from the group consisting of i) phenyl, ii) phenyl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, halogen-C 1-6 -alkyl and halogen iii) heteroaryl, and iv) heteroaryl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, halogen-C 1-6 -alkyl and halogen; i) phenyl, ii) phenyl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, halogen-C 1-6 -alkyl and halogen iii) heteroaryl, and iv) heteroaryl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, halogen-C 1-6 -alkyl and halogen; R 6 is selected from the group consisting of i) cyano, ii) halogen; iii) C 1-6 -alkyl, iv) halogen-C 1-6 -alkyl, v) C 2-6 -alkynyl-O-, vi) heteroaryl, and vii) heteroaryl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, C 1-6 -alkoxy, halogen-C 1-6 -alkyl, halogen-C 1-6 -alkoxy and halogen; i) cyano, ii) halogen; iii) C 1-6 -alkyl, iv) halogen-C 1-6 -alkyl, v) C 2-6 -alkynyl-O-, vi) heteroaryl, and vii) heteroaryl, substituted by 1-3 substituents individually selected from cyano, C 1-6 -alkyl, C 1-6 -alkoxy, halogen-C 1-6 -alkyl, halogen-C 1-6 -alkoxy and halogen; R 7 is selected from the group consisting of i) halogen, and ii) halogen-C 1-6 -alkyl; i) halogen, and ii) halogen-C 1-6 -alkyl; m is 1 or 2; n is 0 or 1; and p is 0, 1 or 2;