Metal complexes

Abstract

The present invention provides novel metal complexes, methods of making, and methods of using the same.

What is claimed is: 
     
         1 . A metallosalenate complex comprising a cationic bicyclic amidinium group, wherein the cationic bicyclic amidinium group has no free amines. 
     
     
         2 . The metallosalenate complex of  claim 1 , wherein the metallosalenate complex is of formula I: 
       
         
           
           
               
               
           
         
       
       wherein,
 R 1a  and R 1a′  are independently a hydrogen or an optionally substituted radical selected from the group consisting of C 1-12  aliphatic; C 1-12  heteroaliphatic; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 5- to 6-membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated heterocyclic ring having 1-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur; 
 each R d  is independently a -L-CA group, halogen, —OR, —NR 2 , —SR, —CN, —NO 2 , —SO 2 R, —SOR, —SO 2 NR 2 ; —CNO, —CO 2 R, —CON(R) 2 , —OC(O)NR 2 , —OC(O)OR, —NRSO 2 R, —NCO, —N 3 , —SiR 3 ; or an optionally substituted radical selected from the group consisting of C 1-20  aliphatic; C 1-20  heteroaliphatic; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 7- to 14-membered saturated, partially unsaturated or aromatic polycyclic carbocycle; a 5- to 6-membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated heterocyclic ring having 1-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 6- to 12-membered polycyclic saturated or partially unsaturated heterocycle having 1-5 heteroatoms independently selected from nitrogen, oxygen, or sulfur; or an 8- to 10-membered bicyclic heteroaryl ring having 1-5 heteroatoms independently selected from nitrogen, oxygen, or sulfur; where two or more R d  groups may be taken together with intervening atoms to form one or more optionally substituted rings optionally containing one or more heteroatoms, wherein at least one occurrence of R d  is a -L-CA group; 
 each -L- is independently a covalent bond or an optionally substituted, saturated or unsaturated, straight or branched, bivalent C 1-12  hydrocarbon chain, wherein one or more methylene units of -L- are optionally and independently replaced by -Cy-, —CR 2 —, —NR—, —N(R)C(O)—, —C(O)N(R)—, —N(R)SO 2 —, —SO 2 N(R)—, —O—, —C(O)—, —OC(O)—, —OC(O)O—, —C(O)O—, —N(R)C(O)O—, —SiR 2 —, —S—, —SO—, or —SO 2 —; 
 each -CA is independently a cationic bicyclic amidinium group having no free amines; 
 each Cy is independently an optionally substituted bivalent ring selected from phenylene, a 3-7 membered saturated or partially unsaturated carbocyclylene, a 3-7 membered saturated or partially unsaturated monocyclic heterocyclylene having 1-2 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or a 5-6 membered heteroarylene having 1-3 heteroatoms independently selected from nitrogen, oxygen; 
 R 4b  is selected from the group consisting of: 
 
       
         
           
           
               
               
           
         
       
       where
 R c  at each occurrence is independently hydrogen, halogen, —OR, —NR 2 , —SR, —CN, —NO 2 , —SO 2 R, —SOR, —SO 2 NR 2 ; —CNO, —CO 2 R, —CON(R) 2 , —OC(O)NR 2 , —OC(O)OR, —NRSO 2 R, —NCO, —N 3 , —SiR 3 ; or an optionally substituted radical selected from the group consisting of C 1-20  aliphatic; C 1-20  heteroaliphatic; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 7- to 14-membered saturated, partially unsaturated or aromatic polycyclic carbocycle; a 5- to 6-membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated heterocyclic ring having 1-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 6- to 12-membered polycyclic saturated or partially unsaturated heterocycle having 1-5 heteroatoms independently selected from nitrogen, oxygen, or sulfur; or an 8- to 10-membered bicyclic heteroaryl ring having 1-5 heteroatoms independently selected from nitrogen, oxygen, or sulfur; where two or more R c  groups may be taken together with the carbon atoms to which they are attached and any intervening atoms to form one or more optionally substituted rings; 
 R at each occurrence is independently hydrogen, an optionally substituted radical selected the group consisting of acyl; C 1-20  aliphatic; C 1-20  heteroaliphatic; carbamoyl; arylalkyl; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 7- to 14-membered saturated, partially unsaturated or aromatic polycyclic carbocycle; a 5- to 6-membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated heterocyclic ring having 1-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 6- to 12-membered polycyclic saturated or partially unsaturated heterocycle having 1-5 heteroatoms independently selected from nitrogen, oxygen, or sulfur; or an 8- to 10-membered bicyclic heteroaryl ring having 1-5 heteroatoms independently selected from nitrogen, oxygen, or sulfur; an oxygen protecting group; and a nitrogen protecting group, where two R groups on the same nitrogen atom can optionally be taken together to form an optionally substituted 3- to 7-membered ring; 
 T is a divalent linker selected from the group consisting of: —NR—, —N(R)C(O)—, —C(O)NR—, —O—, —C(O)—, —OC(O)—, —C(O)O—, —S—, —SO—, —SO 2 —, —SiR 2 —, —C(═S)—, —C(═NR)—, or —N═N—; a polyether; a C 3  to C 8  substituted or unsubstituted carbocycle; and a C 1  to C 8  substituted or unsubstituted heterocycle; 
 M is a metal atom; 
 each X is independently a suitable counterion; 
 k is from 0 to 2, inclusive; 
 m is from 0 to 6, inclusive; 
 m′ is from 0 to 4, inclusive; 
 q is from 0 to 4, inclusive; and 
 x is from 0 to 2, inclusive. 
 
     
     
         3 . The metallosalenate complex of  claim 2 , wherein the metallosalenate complex is of formula II or II-a: 
       
         
           
           
               
               
           
         
       
     
     
         4 . The metallosalenate complex of  claim 3 , wherein the metallosalenate complex is of formula: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         5 . The metallosalenate complex of  claim 1 , wherein R 1a  and R 1a′  are hydrogen. 
     
     
         6 . The metallosalenate complex of any one of  claims 2 - 4 , wherein M is selected from the group consisting of Cr, Mn, V, Fe, Co, Mo, W, Ru, Al, and Ni. 
     
     
         7 . The metallosalenate complex of  claim 6 , wherein one occurrence of R d  is a -L-CA group, and any other R d  groups are an optionally substituted C 1-20  aliphatic group or an optionally substituted phenyl group. 
     
     
         8 . The metallosalenate complex of any one of  claims 2 - 4 , wherein -L- is an optionally substituted, saturated or unsaturated, straight or branched, bivalent C 1-6  hydrocarbon chain, wherein one, two, or three methylene units of L are optionally and independently replaced by -Cy-, —CR 2 —, —NR—, —N(R)C(O)—, —C(O)N(R)—, —N(R)SO 2 —, —SO 2 N(R)—, —O—, —C(O)—, —OC(O)—, —OC(O)O—, —C(O)O—, —N(R)C(O)O—, —SiR 2 —, —S—, —SO—, or —SO 2 —. 
     
     
         9 . The metallosalenate complex of  claim 8 , wherein -L- is an optionally substituted, saturated or unsaturated, straight or branched, bivalent C 1-6  hydrocarbon chain, wherein one or two methylene units of L are optionally and independently replaced by —NR—, —O—, or —C(O)—. 
     
     
         10 . The metallosalenate complex of  claim 9 , wherein -L- is —(CH 2 ) 1-6 —. 
     
     
         11 . The metallosalenate complex of any one of  claims 2 - 4 , wherein -L- is selected from the group consisting of: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
       where * represents the site of attachment to the salen ligand, each # represents a site of attachment amidinium group, and R y  is —H, or an optionally substituted radical selected from the group consisting of C 1-6  aliphatic, 3- to 7-membered heterocyclic, phenyl, and 8- to 10-membered aryl. 
     
     
         12 . The metallosalenate complex of  claim 8 , wherein CA is selected from the group consisting of: 
       
         
           
           
               
               
           
         
       
     
     
         13 . The metallosalenate complex of any one of  claims 2 - 4 , wherein the ligand portion of the metal complex comprises a substructure selected from the group consisting of: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         14 . The metallosalenate complex of  claim 2 , wherein the metal complex is of formula III: 
       
         
           
           
               
               
           
         
       
       wherein:
 each X is independently a suitable counterion; and 
 Y, when present, is a suitable counterion;
 wherein when k is 2, Y is absent and X comprises two monodentate moieties or a single bidentate moiety, 
 and when k is 1, X comprises a monodentate moiety; 
 
 or X and Y are taken together to comprise a suitable dianion. 
 
     
     
         15 . The metallosalenate complex of  claim 14 , wherein the metal complex is of formula III-a: 
       
         
           
           
               
               
           
         
       
     
     
         16 . The metallosalenate complex of  claim 14 , wherein Y is selected from the group consisting of halide, hydroxide, carboxylate, sulfate, phosphate, nitrate, alkyl sulfonate, and aryl sulfonate. 
     
     
         17 . The metallosalenate complex of  claim 16 , wherein Y is chloro, bromo, or iodo. 
     
     
         18 . The metallosalenate complex of  claim 17 , wherein Y is chloro. 
     
     
         19 . The metallosalenate complex of any one of  claims 2 - 4  or  14 , wherein X is selected from the group consisting of —OR x , —O(C═O)R x , —O(C═O)OR x , —O(C═O)N(R) 2 , —NC, —CN, —NO 3 , halogen, —N 3 , —O(SO 2 )R x  and —OPR x   3 , wherein each R x  is, independently, selected from hydrogen, optionally substituted aliphatic, optionally substituted heteroaliphatic, optionally substituted aryl and optionally substituted heteroaryl. 
     
     
         20 . The metallosalenate complex of any one of  claims 2 - 4  or  14 , wherein k is 1. 
     
     
         21 . The metallosalenate complex of any one of  claims 2 - 4  or  14 , wherein k is 2. 
     
     
         22 . The metallosalenate complex of  claim 21 , wherein X is carbonate. 
     
     
         23 . The metallosalenate complex of any one of  claims 2 - 4  or  14 , wherein M is cobalt. 
     
     
         24 . The metallosalenate complex of  claim 14  having the structure: 
       
         
           
           
               
               
           
         
       
     
     
         25 . A method comprising the step of contacting an epoxide and carbon dioxide with a metallosalenate complex of any one of  claims 1 - 24  to form a polycarbonate polymer composition, wherein the polycarbonate polymer composition is substantially free of covalently-bound metal complex or any portion thereof. 
     
     
         26 . A method comprising the steps of:
 i. contacting an epoxide and carbon dioxide with a metal complex of any one of  claims 1 - 24  to form a polycarbonate polymer composition; and   ii. performing chromatography, filtration, or precipitation to obtain isolated polycarbonate polymer composition.   
     
     
         27 . The method of  claim 26 , wherein the isolated polycarbonate polymer composition is pure. 
     
     
         28 . The method of  claim 26 , wherein the isolated polycarbonate polymer composition is substantially free of the metal complex or any portion thereof. 
     
     
         29 . A method comprising the steps of:
 i. contacting an epoxide and carbon dioxide with a metal complex of any one of  claims 1 - 24  to form a polycarbonate polymer composition; and   ii. performing chromatography to obtain substantially isolated, intact metal complex.