Processes for intermediates for macrocyclic compounds

Abstract

The present invention is directed to novel macrocyclic compounds of formula (I) and their pharmaceutically acceptable salts, hydrates or solvates: wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , n 1 , m, p Z 1 , Z 2 , and Z 3 are as describe in the specification. The invention also relates to compounds of formula (I) which are antagonists of the motilin receptor and are useful in the treatment of disorders associated with this receptor and with or with motility dysfunction.

1 - 28 . (canceled) 
     
     
         29 . A process for preparing a compound of formula (G): 
       
         
           
           
               
               
           
         
         wherein R 1  is C 1 -C 4  alkyl and PG 1  is an amine protecting group; the process comprising: 
         (a) contacting a compound of formula (A): 
       
       
         
           
           
               
               
           
         
         with a compound of formula (B): 
       
       
         
           
           
               
               
           
         
         in the presence of an azodicarboxylate reagent and a phosphine reagent, or in the presence of a combined Mitsunobu reagent, to form a compound of formula (C): 
       
       
         
           
           
               
               
           
         
         wherein X is halogen or triflate and PG 2  is an ester protecting group; 
         (b) contacting the compound of formula (C) with a reducing agent to form a compound of formula (D): 
       
       
         
           
           
               
               
           
         
         (c) contacting the compound of formula (D) with a compound of formula (E): 
       
       
         
           
           
               
               
           
         
         in the presence of a palladium catalyst, optionally a copper salt and/or optionally an organic base to form a compound of formula (F): 
       
       
         
           
           
               
               
           
         
       
       and
 (d) contacting the compound of formula (F) with hydrogen in the presence of a metal catalyst to form the compound of formula (G). 
 
     
     
         30 - 46 . (canceled) 
     
     
         47 . The process of  claim 29 , wherein the compound of formula (G) is: 
       
         
           
           
               
               
           
         
       
     
     
         48 . The process of  claim 29 , wherein the compound of formula (B) is selected from the group consisting of: 
       
         
           
           
               
               
           
         
         wherein PG 2  is an ester protecting group. 
       
     
     
         49 . The process of  claim 29 , wherein X is iodine. 
     
     
         50 . The process of  claim 29 , wherein PG 1  is hydrogen. 
     
     
         51 . The process of  claim 29 , wherein PG 1  is a carbamate protecting group. 
     
     
         52 . The process of  claim 29 , wherein PG 1  is selected from the group consisting of tert-butoxycarbonyl (Boc), benzyloxycarbonyl (Cbz), 9-fluorenylmethoxycarbonyl (Fmoc), α,α-dimethyl-3,5-dimethoxybenzyloxycarbonyl (Ddz) and allyloxycarbonyl (Alloc). 
     
     
         53 . The process of  claim 29 , wherein PG 2  is an alkyl group or an alkyl group substituted with an aryl group. 
     
     
         54 . The process of  claim 29 , wherein PG 2  is methyl, ethyl or benzyl. 
     
     
         55 . The process of  claim 29 , wherein the azodicarboxylate reagent is selected from the group consisting of diethylazodicarboxylate (DEAD) and diisopropylazodicarboxylate (DIAD). 
     
     
         56 . The process of  claim 29 , wherein the phosphine reagent is selected from the group consisting of triphenylphosphine and tributylphosphine. 
     
     
         57 . The process of  claim 29 , wherein the combined Mitsunobu reagent is a triphenylphosphine-diisopropylazodicarboxylate (DIAD) adduct. 
     
     
         58 . The process of  claim 29 , wherein the reducing agent is selected from the group consisting of an aluminum hydride and a borohydride. 
     
     
         59 . The process of  claim 29 , wherein the reducing agent is selected from the group consisting of diisobutylaluminum hydride (DIBAL-H), lithium aluminum hydride (LAH), and lithium borohydride. 
     
     
         60 . The process of  claim 29 , wherein the palladium catalyst is selected from the group consisting of dichlorobis(triphenylphosphine)palladium(II), dichlorobis(acetonitrile)-palladium(II), dichlorobis(benzonitrile)palladium(II), tetrakis(triphenyl-phosphine)palladium(0) and tris(dibenzylideneacetone)dipalladium(0). 
     
     
         61 . The process of  claim 29 , wherein the copper salt is a copper halide. 
     
     
         62 . The process of  claim 29 , wherein the copper salt is copper (I) iodide. 
     
     
         63 . The process of  claim 29 , wherein the copper salt is not present. 
     
     
         64 . The process of  claim 29 , wherein the organic base is selected from the group consisting of a dialkylamine, a trialkylamine and an aromatic amine. 
     
     
         65 . The process of  claim 29 , wherein the organic base is triethylamine (TEA), diisopropylamine or N,N-diisopropylethylamine (DIPEA). 
     
     
         66 . The process of  claim 29 , wherein the organic base is not present. 
     
     
         67 . The process of  claim 29 , wherein (c) is conducted in the presence of a phosphine. 
     
     
         68 . The process of  claim 29 , wherein the metal catalyst is palladium on carbon or platinum oxide. 
     
     
         69 . The process of  claim 29  further comprising one or more purification steps. 
     
     
         70 . The process of  claim 29 , wherein contacting the compound of formula (A) with a compound of formula (B) in the presence of an azodicarboxylate reagent and a phosphine reagent, or in the presence of a combined Mitsunobu reagent, to form a compound of formula (C) is replaced by contacting the compound of formula (A) with a compound of formula (H): 
       
         
           
           
               
               
           
         
         wherein Y is a leaving group, R 1  is C 1 -C 4  alkyl and PG 7  is an ester protecting group, in the presence of a base to form the compound of formula (C). 
       
     
     
         71 . The process of  claim 70 , wherein Y is a halogen or a sulfonate. 
     
     
         72 . The process of  claim 70 , wherein Y is selected from the group consisting of 4-methylbenzenesulfonate (tosylate), methanesulfonate (mesylate), 2-nitrobenezenesulfonate, 4-nitrobenezenesulfonate (nosylate), 2,4-dinitrobenezenesulfonate, 4-bromobenezenesulfonate (brosylate), trifluoromethanesulfonate (triflate), chloride, bromide and iodide. 
     
     
         73 . The process of  claim 70 , wherein the base is selected from the group consisting of a hydrogen carbonate salt, a carbonate salt, a trialkylamine and an aromatic amine. 
     
     
         74 . A process for using a compound of formula (G): 
       
         
           
           
               
               
           
         
         wherein R 1  is C 1 -C 4  alkyl and PG 1  is an amine protecting group, to make a compound of formula (I):