FIELD: chemistry.
SUBSTANCE: invention relates to a compound of general formula 
(I) or pharmaceutically acceptable salts thereof, where Alk is an C1-C6alkyl group; G is C=O and Q is CR51R52 or NR51, where R51 and R52, being identical or different, independently denote H, C1-C6alkyl, optionally substituted with a substitute selected from a group comprising carboxy, phenoxy, benzyloxy, C1-C6alkoxy or hydroxy; C3-C6cycloalkylC1-C6alkyl; phenylC1-C6alkyl, optionally substituted with a halogen; phenylamidoC1-C6alkyl; phenylC1-C6alkylamidoC1-C6alkyl, optionally substituted with a C1-C6alkoxy group; or R51 and R52, together with a carbon atom with which they are bonded form a C=O or C2-C6alkenyl group, optionally substituted with a phenyl; M1 is CR49, where R49 is H; M2 is CR50, where R50 is H; R38 is H, C1-C6alkyl, substituted with a phenoxy group; C3-C6cycloalkylC1-C6alkyl; arylC1-C6alkyl, optionally substituted with 1 or 2 substitutes selected from a group comprising C1-C6alkyl, C1-C6alkoxy, C1-C6alkoxycarbonyl, carboxyl, N-methylamido, hydroxy, C1-C6alkoxyC1-C6alkoxy, C1-C6alkylthio, C1-C6alkylsulphanyl, cyano, halogen, perfluoroC1-C6alkyl, nitro, formyl, hydroxyC1-C6alkyl and amino, wherein the aryl moiety is a phenyl or naphthyl; and heteroarylC1-C6alkyl, where the heteroaryl moiety is pyridinyl, optionally substituted with 1 or 2 groups selected from C1-C6alkoxy or hydroxyC1-C6alkyl, pyrazolyl or isoxazolyl, substitute with 1 or 2 C1-C6alkyl groups; R47 and R48 is C1-C6alkyl. The invention also relates to specific compounds, a method of reducing or weakening bitter taste, a composition of a food/non-food product or beverage or drug for reducing or lightening bitter taste and a method of producing a compound of formula (I).
EFFECT: obtaining novel compounds which are useful as bitter taste inhibitors or taste modulators.
37 cl, 6 dwg, 12 tbl, 186 ex
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