Patent ID: 8138180

Claim:
A process for preparing Compound 3A: wherein R 11 is unsubstituted alkyl, R 12 is halogen, and n is 1, comprising: (a) reducing Compound 7 to Compound 7A′: wherein R 15 and R 16 are each independently selected from the group consisting of H, unsubstituted alkyl or phenyl, or, when taken together with the nitrogen to which they are attached, form a morpholine ring; (b) hydrolyzing Compound 7A′ to yield Compound 15: (c) aminating Compound 15 to yield Compound 4: wherein R 10 and R 11 are H; (d) converting Compound 4 to Compound 17: (e) converting Compound 17 to Compound 18: (f) converting Compound 18 to Compound 3A: