9amp;#x2032;-Aza3,9amp;#x2032;-bi(bicyclo3.3.1nonan)-3amp;#x2032;-one and preparation thereof

摘要

Compounds of Formula (I):; where R₁, R₂, R₅, a, and b are disclosed herein, and pharmaceutically acceptable derivatives thereof, compositions thereof, and methods to treat or prevent a condition (such as pain) thereof. The disclosure also provides compounds of formula QB or O2 and their utility in manufacture processes in obtaining compounds of Formula (I).