C. Org. Process Res. Dev. 2022, 26, 2096; when compound D was prepared, the plan was to treat it with a strong base and form an epoxide using an intramolecular substitution reaction. In fact, the epoxide formation was interrupted. This outcome might have been due to:
a) Insufficient reaction time
b) Inappropriate reaction temperature
c) Presence of impurities in the reactants
d) Lack of catalyst in the reaction system
