MolSynapsequestion bank

MolSynapse / Question bank / Aldehydes, Ketones and Carboxylic Acids / Aldol, Cannizzaro, Perkin, Claisen and related condensations

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3co108

With catalytic NaOEt in ethanol, which pairs of reactants undergo Michael (conjugate) addition? (One or more answers)

Adiethyl propanedioate and but-3-en-2-one
Bnitromethane and 1,3-diphenylprop-2-en-1-one
Cdiethyl propanedioate and propanone
Dethyl 3-oxobutanoate and prop-2-enenitrile

Answer: A, B, D

Michael addition needs a stabilised carbanion donor (malonate, nitroalkane, beta-keto ester) and an alpha,beta-unsaturated acceptor (enone, chalcone, acrylonitrile). Pairs 1, 2 and 4 fit. Propanone has no C=C acceptor, so pair 3 does not give a Michael adduct.

Practice Aldehydes, Ketones and Carboxylic Acids More on Aldol, Cannizzaro, Perkin, Claisen and related condensations

Previous questionNext question

More questions on Aldol, Cannizzaro, Perkin, Claisen and related condensations

Which diesters give a five- or six-membered cyclic beta-keto ester as the main product when treated with one equivalent of NaOEt in ethanol ... JEE Advanced level
Which statements about the Reformatsky reaction are correct? (One or more answers) JEE Advanced level
Which compounds contain exactly four alpha-hydrogen atoms? (One or more answers) JEE Advanced level
Which transformations form a six-membered ring as the new ring? (One or more answers) JEE Advanced level
Benzaldehyde (5.30 g, molar mass 106 g mol^-1) is converted into cinnamic acid by the Perkin reaction with an isolated yield of 64%. All of ... JEE Advanced level