SYNTHESIS METHODS AND INTERMEDIATE COMPOUNDS DURING SYNTHESIS OF STEREOISOMERIC COMPOUNDS, SUITABLE FOR TREATING GASTROINTESTINAL DISORDERS AND CENTRAL NERVOUS SYSTEM DISORDERS Russian patent published in 2011 - IPC C07D453/02 C07D211/58 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing (R)- quinuclidin-3-yl 6-((3S,4R)-4-(4-amino-5-chloro-2-methoxybenzamide)-3-methoxypiperidin-1-yl)hexanoate or salt thereof, involving: 1) converting a compound which is 4-amino-3-methoxypiperidine-1-carboxylate to a salt; 2) converting the ethyl 4-amino-3-methoxypiperidine-1-carboxylate salt into ethyl 4-(diphenylamine)-3-methoxypiperidine-1-carboxylate 3) treating ethyl 4-(diphenylamino)-3-methoxypiperidine-1-carboxylate with hydroxide or hydride of an alkali metal to obtain 3-methoxy-N,N-diphenylpiperidine-4-amine 4) obtainijng a chiral salt of the cis-isomer of 3-methoxy-N,N-diphenylpiperidine-4-amine by bringing 3-methoxy-N,N-diphenylpiperidine-4-amine into contact with a chiral splitting agent and extracting the obtained chiral salt of the cis-isomer of 3-methoxy-N,N-diphenylpiperidine-4-amine; optional recrystalisation of product 4; converting product 4 or 5 to a base to obtain product 4 or 5 in form of a free base; 7) bringing product 6 into contact with ethyl 6-bromohexanoate to obtain ethyl 6-((3S,4R)-4-(diphenylamine)-3-methoxypiperidin-1-yl)hexanoate 8) esterification of ethyl 6-((3S,4R)-4-(diphenylamine)-3-methoxypiperidin-1-yl)hexanoate using (R)-quinuclidin-3-ol with a Lewis acid to obtain (R)- quinuclidin-3-yl 6-((3S,4R)-4-(diphenylamine)-3-methoxypiperidin-1-yl)hexanoate 9) removing protection from the 4-amine group of product 8 to obtain (R- quinuclidin-3-yl 6- [(3S,4R)-4-amino-3-methoxypiperidin-1-yl)hexanoate; 10) acylation of product 9 4-amino-5-chloro-2-methoxybenzoic acid to obtain (R)- quinuclidin-3-yl 6-((38,4R)-4-(4-amino-5-chloro-2-methoxybenzamide)-3-methoxypiperidin-1-yl)hexanoate; 11) optional conversion of product 10 into a salt.

EFFECT: method increases output of the end product and reduces content of impurities.

7 cl, 3 ex, 6 tbl, 3 dwg