Abstract:
Intermediates and processes are disclosed which are useful for the preparation of a substantially pure compound of formula (3), wherein R6 and R7 are each hydrogen or R6 and R7 are independently selected from (i), wherein Ra and Rb are independently selected from hydrogen, loweralkyl and phenyl and Rc, Rd and Re are independently selected from hydrogen, loweralkyl, trifluoromethyl, alkoxy, halo and phenyl; and (ii) wherein the naphthyl ring is unsubstituted or substituted with one, two or three substituents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or R6 is as defined above and R7 is R7aOC (O)-wherein R7a is loweralkyl or benzyl; or R6 and R7 taken together with the nitrogen atom to which they are bonded are (a) or (b), wherein Rf, Rg, Rh and Ri are independently selected from hydrogen, loweralkyl, alkoxy, halogen and trifluoromethyl and R8 is hydrogen or -C(O)R" wherein R" is loweralkyl, alkoxy, benzyloxy or phenyl wherein the phenyl ring is unsubstituted or substituted with one, two or three substituents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or an acid addition salt thereof.
Abstract:
The present invention discloses a process for the preparation of a substantially pure compound having formula (4). The process comprises the step of reacting an enolate having formula (A) with a Grignard reagent. The enolate salt is formed in situ from the reaction of a protected ester wherein M is an alkali metal. R6 and R7 are each hydrogen or are independently selected from (i) wherein Ra and Rb are independently selected from hydrogen, lower alkyl and phenyl and Rc, Rd and Re are independently selected from hydrogen, lower alkyl, trifluoromethyl, alkoxy, halo and phenyl; and (ii) wherein the naphthyl ring is unsubstituted or substituted with one, two or three substituents independently selected from lower alkyl, trifluoromethyl, alkoxy and halo. Alternatively, R6 is as defined above and R7 is R12OC(O)- wherein R12 is benzyl; or R6 and R7 taken together with the nitrogen atom to which they are bonded form (B) or (C), wherein Rf, Rg, Rh and Ri are independently selected from hydrogen, lower alkyl, alkoxy, halogen and trifluoromethyl.
Abstract:
The present invention discloses a process for the preparation of a substantially pure compound having formula (4). The process comprises the step of reacting an enolate having formula (A) with a Grignard reagent. The enolate salt is formed in situ from the reaction of a protected ester wherein M is an alkali metal. R6 and R7 are each hydrogen or are independently selected from (i) wherein Ra and Rb are independently selected from hydrogen, lower alkyl and phenyl and Rc, Rd and Re are independently selected from hydrogen, lower alkyl, trifluoromethyl, alkoxy, halo and phenyl; and (ii) wherein the naphthyl ring is unsubstituted or substituted with one, two or three substituents independently selected from lower alkyl, trifluoromethyl, alkoxy and halo. Alternatively, R6 is as defined above and R7 is R12OC(O)- wherein R12 is benzyl; or R6 and R7 taken together with the nitrogen atom to which they are bonded form (B) or (C), wherein Rf, Rg, Rh and Ri are independently selected from hydrogen, lower alkyl, alkoxy, halogen and trifluoromethyl.
Abstract:
Intermediates and processes are disclosed which are useful for the preparation of a substantially pure compound of formula (3), wherein R6 and R7 are each hydrogen or R6 and R7 are independently selected from (i), wherein Ra and Rb are independently selected from hydrogen, loweralkyl and phenyl and Rc, Rd and Re are independently selected from hydrogen, loweralkyl, trifluoromethyl, alkoxy, halo and phenyl; and (ii) wherein the naphthyl ring is unsubstituted or substituted with one, two or three substituents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or R6 is as defined above and R7 is R7aOC (O)-wherein R7a is loweralkyl or benzyl; or R6 and R7 taken together with the nitrogen atom to which they are bonded are (a) or (b), wherein Rf, Rg, Rh and Ri are independently selected from hydrogen, loweralkyl, alkoxy, halogen and trifluoromethyl and R8 is hydrogen or -C(O)R' wherein R' is loweralkyl, alkoxy, benzyloxy or phenyl wherein the phenyl ring is unsubstituted or substituted with one, two or three substituents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or an acid addition salt thereof.
Abstract:
Intermediates and processes are disclosed which are useful for the preparation of a substantially pure compound of formula (3), wherein R6 and R7 are each hydrogen or R6 and R7 are independently selected from (i), wherein Ra and Rb are independently selected from hydrogen, loweralkyl and phenyl and Rc, Rd and Re are independently selected from hydrogen, loweralkyl, trifluoromethyl, alkoxy, halo and phenyl; and (ii) wherein the naphthyl ring is unsubstituted or substituted with one, two or three substituents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or R6 is as defined above and R7 is R7aOC (O)-wherein R7a is loweralkyl or benzyl; or R6 and R7 taken together with the nitrogen atom to which they are bonded are (a) or (b), wherein Rf, Rg, Rh and Ri are independently selected from hydrogen, loweralkyl, alkoxy, halogen and trifluoromethyl and R8 is hydrogen or -C(O)R' wherein R' is loweralkyl, alkoxy, benzyloxy or phenyl wherein the phenyl ring is unsubstituted or substituted with one, two or three substituents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or an acid addition salt thereof.