List at least 3 catalysts widely used in aldol addition/condensation and draw a

Question

List at least 3 catalysts widely used in aldol addition/condensation and draw a representative aldol reaction using one of those catalytic agents. List at least 3 different solvents widely used in aldol addition/condensation. Acetone is a common solvent in organic syntheses. Explain why acetone cannot be used in aldol condensation as a solvent? Predict how many stereoisomeric aldol products will be produced in the following aldol addition. Draw the structures of all the aldol products. Show all relevant stereochemistry.

Explanation / Answer

a) three catalysts used in aldol reactions are lithium enolates, silyl enol ethers and zn enolates

b) three solvents used in reactions are THF, NaOH:H2O, NaOMe:MeOH

c) In aldol product we obtain diastereomeric structure i.e. syn and anti product.

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