[kjyotishman48]

Please help me to write the reaction mechanism of the following reaction (attached in the picture below)

[sjb]

Consider https://www.reddit.com/r/chemistry/comments/iw8ig2/anyone_knows_what_will_be_the_mechanism_for_this/ as well.

[Enthalpy]

Interesting! Is the ketone necessary to the reaction? Two more carbons and a small spiro would inject fuss into banal compounds to serve as, well, you know.
carene
alpha-Pinene
beta-Pinene

Can sodium amide be prepared in small amount at the last moment next to the main reactor? By recycling NH₃ and electrolysing molten NaBr?
Or is lithium amide advantageous?

[Enthalpy]

Any link? A reaction name maybe?

What I've seen up to now is that sodium amide abstracts HX very efficiently and can close cycles. I guess it rips two H from the other molecule in the OP reactions.

But this doesn't tell me whether a ketone group is needed.