Abstract: The invention provides 4-{[1-(aminocarbonyl)-4-piperidinyl]amino}-N-[(3,4-dimethylphenyl)methyl]-1-ethyl-1H-pyrazolo[3,4-b]pyridine-5-carboxamide, which is the compound of formula (I): or a salt thereof.

Abstract: The invention relates to a compound of formula (I) or a salt thereof: wherein: R1 is C1-4alkyl, C1-3fluoroalkyl or —(CH2)2OH; R2 is a hydrogen atom (H), methyl or C1fluoroalkyl; R3a is a hydrogen atom (H) or C1-3alkyl; R3 is optionally substituted branched C3-6alkyl, optionally substituted C3-8cycloalkyl, optionally substituted mono-unsaturated-C5-7cycloalkenyl, optionally substituted phenyl, or an optionally substituted heterocyclic group of sub-formula (aa), (bb) or (cc): in which n1 and n2 independently are 1 or 2; and Y is O, S, SO2, or NR4; and wherein Het is of sub-formula (i), (ii), (iii), (iv) or (v): The compounds are phosphodiesterase (PDE) inhibitors, in particular PDE4 inhibitors.

Abstract: The invention relates to a compound of formula (I) or a salt thereof: wherein: R1 is Et, n-Pr, i-Pr, C2fluoroalkyl, or —CH2CH2OH; R2 is H, Me, Et, n-Pr, i-Pr, C1-2fluoroalkyl, cyclopropyl or (cyclopropyl)methyl-; and NHR3 has the sub-formula (nhr3): wherein R3a is methyl or ethyl; R3b is H, methyl or ethyl; R3c is H, methyl or ethyl, R3d is H, methyl or ethyl, and R3e is H or methyl, provided that: (a) R3b is methyl or ethyl; and/or (b) R3c and R3d are independently methyl or ethyl; and provided that: (c) when R3c is ethyl and/or when R3d is ethyl and/or when R3e is methyl, then: R3a is methyl and/or R3b is hydrogen or methyl. These compounds are PDE4 inhibitors.

Abstract: The invention provides a compound of formula (I) or a salt thereof: wherein: R1 is C1-3alkyl, C1-3fluoroalkyl, or —CH2CH2OH; R2 is hydrogen, methyl or C1fluoroalkyl; R3 is of sub-formula (aa) or (bb): wherein Y is NCONH2 and n1 is 0 or 1; R4 is H; and R5 is a group of the sub-formula (x), (y), (y1) or (z): These compounds are PDE4 inhibitors.

Abstract: The invention relates to a compound of formula (I) or a salt thereof: wherein: R1 is C1-4alkyl, C1-3fluoroalkyl, —CH2CH2OH or —CH2CH2CO2C1-2alkyl; R2 is a hydrogen atom (H), methyl or C1fluoroalkyl; R3 is optionally substituted C3-8cycloalkyl or optionally substituted mono-unsaturated-C5-7cycloalkenyl or an optionally substituted heterocyclic group of sub-formula (aa), (bb) or (cc); in which n1 and n2 independently are 1 or 2; and in which Y is O, S, SO2, or NR10; or R3 is a bicyclic group (dd) or (ee): and wherein X is NR4R5 or OR5a. The compounds are phosphodiesterase (PDE) inhibitors, in particular PDE4 inhibitors. Also provided is the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for the treatment and/or prophylaxis of an inflammatory and/or allergic disease in a mammal such as a human, for example chronic obstructive pulmonary disease (COPD), asthma, or allergic rhinitis.

Abstract: The invention provides a compound of formula (I) or a salt thereof: wherein Ar has the sub-formula (x) or (z): and wherein R3 is optionally substituted C3-8cycloalkyl, optionally substituted C5-7cycloalkenyl, an optionally substituted heterocyclic group (aa), (bb) or (cc), or a bicyclic group (ee); and wherein R4 is H, C1-3alkyl, C1-2fluoroalkyl, cyclopropyl, —CH2OR4a, —CH(Me)OR4a, or —CH2CH2OR4a; and R5 is inter alia H, C1-8alkyl, C1-3fluoroalkyl, C3-8cycloalkyl, certain substituted alkyl groups, —(CH2)n13-Het, or optionally substituted phenyl or —CH2-Ph; or R4 and R5 taken together are —(CH2)p1— or —(CH2)p3—X5—(CH2)p4—; provided that at least one of R4 and R5 is not a hydrogen atom (H). The invention also provides the use of the compounds as inhibitors of phosphodiesterase type IV (PDE4) and/or for the treatment and/or prophylaxis of inflammatory and/or allergic diseases such as chronic obstructive pulmonary disease (COPD), asthma, rheumatoid arthritis, allergic rhinitis or atopic dermatitis.

Abstract: According to the invention are provided compounds of formula (I) (relative stereochemistry indicated) wherein R1, R2 and R3 are as defined in the specification. Compounds of formula (I) are useful inter alia in the treatment of inflammatory diseases of the respiratory tract.

Abstract: There are described according to the invention, processes for making compounds of formula (XXVIII)3 (relative stereochemistry indicated), wherein P2 is as defined in the specification.

Abstract: According to the invention there are provided Hexahydro-Pyrrolo[3,4-b]pyrrol-2-one compounds of formula (1), (relative stereochemistry indicated), wherein R1, R2 and R3 are as defined in the specification. Compounds of formula (1) are useful inter alia in the treatment or chronic bronchitis.

Abstract: There are described according to the invention compounds of formula (I) (relative stereochemistry indicated), wherein R.sub.1, R.sub.2, R.sub.3 and X are as defined in the specification, together with processes for preparing them, compositions containing them and their use as pharmaceuticals. Compounds of formula (I) are indicated inter alia for the treatment of chronic bronchitis.