METHOD FOR PREPARING 1-(2S,3S)-2-BENZHYDRYL-N-(5-TERT-BUTYL-2-METHOCYBENZYL)QUINUCLIDIN-4-AMINE AS CAMPHOR SULFATE SALT, CITRATE SALT AND FREE BASE AND INTERMEDIATE COMPOUND

摘要

FIELD: organic chemistry, chemical technology. ^ SUBSTANCE: invention relates to an improved method for synthesis of 1-(2S,3S)-2-benzhyryl-N-(5-tert.-butyl-2-methoxybenzyl)quinuclidin-3-amine (further named in the claim as "compound of the formula (I)" ) and its pharmaceutically acceptable salts. Invention relates to an improved method of synthesis of citrate monohydrate salt of compound of the formula (Ia): ^ EFFECT: improved method of synthesis. ^ 10 cl, 2 sch,