FIELD: chemistry.
SUBSTANCE: invention relates to a compound of formula
,
where R denotes a substituted or unsubstituted thiazolyl group of formula 
or 
; R4 and R5, each independently, are selected from i) hydrogen; ii) a substituted or unsubstituted C1-C6 linear, C3-C6 branched or C3-C6 cyclic alkyl; iii) a substituted or unsubstituted phenyl; iv) a substituted or unsubstituted heteroaryl containing 5 or 6 ring atoms and 1 or 2 heteratoms, where the heteroatoms are selected from nitrogen, oxygen, sulphur and combination thereof; or R4 and R5 can be taken together to form a saturated or unsaturated ring, having 5-7 atoms; said substitutes are independently selected from one or more groups, selected from C1-C6 linear, C3-C6 branched or C3-C6 cyclic alkyl, halogen, hydroxyl or cyano; R6 denotes a group selected from i) hydrogen; ii) a substituted or unsubstituted C1-C6 linear, C3-C6 branched or C3-C6 cyclic alkyl; iii) a substituted or unsubstituted phenyl or iv) a substituted or unsubstituted heteroaryl containing 5 or 6 ring atoms and 1 or 2 heteroatoms, where the heteroatoms are selected from nitrogen, oxygen, sulphur and combination thereof; where said substitutes are independently selected from one or more groups selected from C1-C6 linear, C3-C6 branched or C3-C6 cyclic alkyl, halogen, hydroxyl or cyano; R1 is selected from i) hydrogen; ii) C1-C6 linear or C3-C6 branched alkyl; iii) a substituted or unsubstituted phenyl or iv) a substituted or unsubstituted benzyl; where said substitutes are independently selected from one or more groups selected from C1-C6 linear, C3-C6 branched or C3-C6 cyclic alkyl, halogen, hydroxyl or cyano; R2 is selected from i) C1-C6 linear or C3-C6 branched alkyl or ii) C1-C6 linear or C3-C6 branched alkoxy; R3 denotes hydrogen or C1-C4 linear or C3-C6 branched alkyl.
EFFECT: compounds of formula (I) are effective as human protein tyrosine phosphatase beta (HPTP-β) inhibitors.
20 cl, 10 tbl, 8 ex
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