FIELD: chemistry.
SUBSTANCE: invention relates to novel intermediate compounds of the given formula or acid-addition salts or solvates thereof, where R1 is -(CO)NH2, -CH2NH2 or -CN; R2=R3=H or R2 and R3 together form a cyclic boronate or a boric acid ester; X is an auxiliary group consisting of i) a five- or six-member heterocyclic aromatic ring containing at least one N atom, which is part of an imino group, where said N atom forms a bonding site for a cyclohexapetide ring and ii) tetrazolyl, for which the nitrogen forms a bonding site for a cyclohexapeptide ring. The present invention also relates to a method of producing caspofungin using said intermediate compounds.
.
EFFECT: improved method.
11 cl, 9 ex
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