FIELD: chemical industry. SUBSTANCE: described is method of preparing compound (I) or salt thereof which comprises reducing compound of formula (II) in the presence of hydrogen, noble metal catalyst, and solvent. Also described are new intermediate compound of formula (II) and methods of preparing thereof. EFFECT: good yield and high degree of purity the desired product. 14 cl, 16 ex
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Authors
Dates
1999-12-27—Published
1994-09-27—Filed