CPC C07D 491/052 (2013.01) [B01J 23/44 (2013.01)] | 20 Claims |
1. A process for preparing a compound of Formula A:
or a pharmaceutically acceptable salt thereof, wherein either R1 or R2 is independently Cl, F, —CF3, or —CH3, and the other is H; and R7 is H or PG, wherein the process comprises reacting a compound of structure 8:
or a salt thereof, wherein R7 is PG or H; wherein PG is an alcohol protecting group, in a solvent with an amine of structure 9
or a salt thereof, and a reducing agent.
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