FIELD: chemistry.
SUBSTANCE: invention relates to novel naphthalen-2-yl-pyrazol-3-one intermediate compounds of formula (V) or (Va), a method for production thereof and use of said intermediate compounds to produce sigma receptor inhibitors.
,
where R1 denotes hydrogen, C1-6alkyl or -C(=O)R4; R2 denotes hydrogen, C1-6alkyl or phenyl; R3 denotes hydrogen or C1-6alkoxy; and R4 denotes hydrogen or C1-4alkyl.
EFFECT: obtaining novel naphthalen-2-yl-pyrazol-3-one intermediate compounds of formula (V) or (Va).
15 cl, 1 tbl, 3 ex
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