FIELD: chemistry.
SUBSTANCE: described is a multi-step method of producing a compound of formula VIII and salt forms thereof of formula VIIIa, where RcSO3H is arylsulphonic acid selected from benzene sulphonic or naphthalene mono- or disulphonic acid, wherein the aryl ring optionally has a methyl or halogen atom as a substitute.
.
EFFECT: technical result is an improved method of producing a compound of formula VIII and arylsulphonate salts thereof, which are ERK inhibitors and can be used to treat hyperproliferative diseases.
12 cl, 22 dwg, 6 tbl, 4 ex
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