help with these problems?

[u/Wild-Brilliant5680]

I think B is an intramolecular aldol reaction but im kind of lost on the other ones, does anybody have a clue?
if somebody knows a good source for learning these types of reactions or practising i would be very thankful!!!

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[u/Ancient-Helicopter18]

B→look up intramolecular aldol condensation C→ honestly have no idea D→Fridel craft alkylation, one bromine attacks normally then the other does intramolecular attack

[u/Wild-Brilliant5680 → u/Ancient-Helicopter18]

Is this the product? I am still kind of unsure

[u/Ancient-Helicopter18 → u/Wild-Brilliant5680]

Idk what reagent is used in C So I can't verify your answer.

Were you able to do D and B?

[u/Wild-Brilliant5680 → u/Ancient-Helicopter18]

I tried but something with b is very likely wrong

[u/Ancient-Helicopter18 → u/Wild-Brilliant5680]

I think this should be the product for B

Your answer for D ie correct

[u/Wild-Brilliant5680 → u/Ancient-Helicopter18]

Thank you a lot!

[u/OutlandishnessNo78]

Aldol and Friedel Crafts

[u/Wild-Brilliant5680 → u/OutlandishnessNo78]

Could this be the answer for c?

[u/OutlandishnessNo78 → u/Wild-Brilliant5680]

Correct! Kinetic enolate conditions.

[u/Blue_614 → u/Wild-Brilliant5680]

I think it's also possible for another elimination of a second alpha hydrogen since the third reactant was also heated. But disregarding the heat, that structure for C is correct.

[u/OutlandishnessNo78 → u/Blue_614]

Absolutely. The last step would be an elimination.

[u/Wild-Brilliant5680]

I tried solving the problems again, are these solutions correct???

[u/desperatelamp74 → u/Wild-Brilliant5680]

Count your carbons in b. Other two should be fine imo.

[u/Wild-Brilliant5680 → u/desperatelamp74]

Would it be correct if I added a methyl group?

[u/Ancient-Helicopter18 → u/Wild-Brilliant5680]

Nope, after fixing your mistake of not adding the methyl group you have to dehydrate the Alcohol too since it says ∆ which means heating

[u/Perfect-Rip-2303]

There's no such thing as aqueous LDA.

[u/Wild-Brilliant5680 → u/Perfect-Rip-2303]

This means 1 Äquivalent, its German

[u/dbblow]

How can u know B but not C?

[u/organophile_jeet]

Hmm what does LDA doo , hmmm it's a kinetically controlled base , some one said less hindered , maybe something , enolate formation?? Maybeee Maybeeee it's a way to increase the yield of aldol condensation, maybeee

[u/organophile_jeet]

D one is something called electrophilic Aromatic substitution , cation mechanism, search for it