FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing a compound of formula (IIa)
and its salt, involving use of protective groups which can be easily incorporated into the compound, have large mass, are stable in the presence of organometallic reagents and be easily, and with high output, removed from in an acidic medium, as well as to novel intermediate compounds used during steps of this method, having general formula (IVe)
, where R5 and R'5 independently denote C1-C7-alkyl, R6 and R8 denote hydrogen, R7 and R9 together form C2-C5-alkylene.
EFFECT: easy production of angiotensin receptor blocker.
8 cl, 11 ex
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