Organic Synthesis And Named Reactions Mock Tests

The crossed aldol condensation between benzaldehyde (C₆H₅CHO) and acetone (CH₃COCH₃) in the presence of aqueous NaOH, followed by heating, primarily yields:

The Heck coupling reaction between bromobenzene and methyl acrylate (CH₂=CH−COOCH₃) catalysed by Pd(OAc)₂ with a base yields:

The product of the Heck reaction between bromobenzene and methyl acrylate in the presence of Pd(OAc)₂, PPh₃, and a base is:

The electrocyclic ring closure of (2E,4Z,6E)-octatriene under thermal conditions proceeds via which mechanism?

The Heck coupling of styrene with an aryl halide Ar-X gives predominantly which product?

When formaldehyde (HCHO) and benzaldehyde (C₆H₅CHO) are treated with concentrated sodium hydroxide (NaOH) in a crossed Cannizzaro reaction, which of the following describes the major products and the regioselectivity of the hydride transfer? (Recall that in the Cannizzaro reaction, one molecule of aldehyde is oxidized to the carboxylate and another is reduced to the alcohol. In the crossed version, consider which aldehyde is more electrophilic and more likely to be attacked by OH⁻.)

The electrocyclic ring closure of (2E,4Z,6E)-octa-2,4,6-triene under thermal conditions proceeds via which stereochemical pathway, and what is the stereochemistry of the resulting cyclohexene product? (Consider the frontier molecular orbital analysis and the Woodward-Hoffmann rules for a conjugated system with 6 π electrons.)

When benzaldehyde (C₆H₅CHO) reacts with acetophenone (C₆H₅COCH₃) in the presence of aqueous NaOH and ethanol under reflux, which product is formed as the major organic compound via the crossed Aldol condensation followed by dehydration? (Consider that benzaldehyde has no α-hydrogens and cannot form an enolate, while acetophenone has α-hydrogens on the methyl group.)