How many alpha H\'s are in butanal? a) 1 b) 2 c) 3 d) 4 e) 5 Which is the right

Question

How many alpha H's are in butanal? a) 1 b) 2 c) 3 d) 4 e) 5 Which is the right statement? a) Ketone will undergo the nucleophilic acyl substitution reaction. b) Aldol condensation needs catalytic amount of base in the beginning. c) Claisen condensation needs catalytic amount of acid in the reaction. d) Ester will undergo the electrophilic acyl substitution. Fisher esterification between benzoic acid and ethanol gives ethyl benzoate having two oxygen atoms in the molecule. a) Two oxygen are from benzoic acid. b) Two oxygen are from alcohol and water. c) The carbonyl oxygen is from alcohol. d) The carbonyl oxygen is from benzoic acid. What is the final product of aldol condensation of acetone? a) 2-Hexanone b) beta-hydroxyketone c) beta-diketone d) alpha, beta-unsat, ketone In the Michael Reaction, which happens? a) An enolate ion attacks an alpha, beta-unsaturated ketone at the beta-carbon. b) An enolate ion attacks an alpha, beta-unsaturated ketone at the alpha-carbon. C) An enolate ion tautomerizes to an enol. d) An enolate ion attacks the carbonyl carbon as an electrophile. In the tautomerism, the enol form of acetone is a) less popular than keto form. b) more reactive than enol. c) more popular than keto form. d) one of two stereoisomers Which is the product of Claisen condensation of methyl acetate? a) beta-ketoester b) alpha, beta-unsaturated ester c) beta-hydroxy ester d) beta-diketone Which one can give a saturated ketone as a product? a) Aldol condensation b) Claisen condensation c) Acetoacetic ester synthesis d) Malonic ester synthesis Robinson annulation is the combined reactions like? a) Michael addition, then aldol condensation b) Michael addition, then Claisen condensation c) Aldol condensation, then Michael addition d) Claisen condensation, then Michael addition Which one would be a product of reaction between methylbenzoate and CH_3MgBr followed by treatment of acidic water? Please draw the structure of the product from the following reaction: Acetone + excess Br_2 with excess NaOH rightarrow

Explanation / Answer

1) Two alpha Hydrogens are present in butanal

2) Aldol condensation needs catalytic amount of base in the beginning.

3) d) carbonyl oxygen is from benzoic acid

4) d) alpha beta unsaturated ketone

5) a) An enolate attack on alpha beta unsaturated ketone at beta carbon.

6) a) less popular than keto form.

7) a) beta ketoester

8) b) claisen condensation reaction

9) a) Michael addition then Aldol condensation.

10) compound C will be the product of reaction.

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