Structure-based design of protein tyrosine phosphatase-1B inhibitors
摘要:
Using structure-based design, a new class of inhibitors of protein tyrosine phosphatase-1B (PTP1B) has been identified, which incorporate the 1,2,5-thiadiazolidin-3-one-1,1-dioxide template.
Compounds of formula (I) ##STR1## wherein R.sup.1 is selected from the group consisting of hydrogen, halogen, hydroxy, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, phenylC.sub.1-3 alkoxy (in which the phenyl group is optionally substituted by a substituent selected from halogen, C.sub.1-3 alkyl, C.sub.1-3 alkoxy and hydroxy), nitro, trifluoromethyl, cyano, --CO.sub.2 R.sup.3 (wherein R.sup.3 is selected from hydrogen and C.sub.1-4 alkyl) and --CONR.sup.4 R.sup.5 (wherein R.sup.4 and R.sup.5 are each independently selected from hydrogen and C.sub.1-4 alkyl, or R.sup.4 and R.sup.5 together with the nitrogen atom to which they are attached form a saturated 5- to 7- membered ring, which ring optionally contains one or more groups or atoms selected from oxygen, sulphur, --NH-- and --N(CH.sub.3)--); and R.sup.2 is selected from the group consisting of hydrogen, halogen, hydroxy, C.sub.1-6 alkyl and C.sub.1-6 alkoxy; and salts thereof are inhibitors of the enzyme 5-lipoxygenase. Processes for preparing the compounds of formula (I) and compositions containing them are also described.
Triazine derivatives of formula (I) ##STR1## or salts thereof, wherein R.sup.1 represents a halogen atom or a group selected from hydroxy; C.sub.1-8 alkyl C.sub.1-6 alkoxy; C.sub.1-3 alkoxy C.sub.1-3 alkoxy; phenoxy or phenyl C.sub.1-3 alkoxy, wherein the phenyl group is optionally substituted by a halogen atom or a group selected from C.sub.1-3 alkyl, C.sub.1-3 alkoxy, or hydroxy; fluoro C.sub.1-3 alkyl; cyano; --CO.sub.2 R.sup.3, wherein R.sup.3 represents a hydrogen atom or a C.sub.1-4 alkyl group; --CONR.sup.4 R.sup.5, wherein R.sup.4 and R.sup.5 each independently represents a hydrogen atom or a C.sub.1-4 alkyl group, or, together with the nitrogen atom to which they are attached, form a saturated 5- to 7- membered ring, which ring optionally contains one or more atoms selected from an oxygen or a sulphur atom, or a group selected from --NH-- or --N(CH.sub.3)--; and R.sup.2 represents a hydrogen or halogen atom, or a group selected from hydroxy, C.sub.1-6 alkyl or C.sub.1-6 alkoxy; are inhibitors of the enzyme 5-lipoxygenase. Processes for preparing the triazine derivatives of formula (I) and compositions containing them are also described.
Chemodivergent reactions of 2,2-dimethoxyacetaldehyde and anilines were described, which were established on the basis of either a CC bond cleavage or a rearrangement process of a reaction intermediate. These reactions proceeded in a condition-determined manner with good functional group tolerance. In the first model, 2,2-dimethoxyacetaldehyde reacted with aniline to form a new CN bond, in the presence