practice midterm 2

practice midterm 2 - 1. Circle the choice or choices within...

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-1- 1. Circle the choice or choices within the brackets which complete the below statements correctly. (18 points) The Claisen condensation [ involves an addition reaction / involves an elimination reaction / is under kinetic control / generally succeeds as long as there is at least one hydrogen α to the ester carbonyl group ]. The main application of acetoacetic and malonic esters in synthesis is for the preparation of substituted [ methyl ketones and carboxylic acids / β -hydroxy ketones and β -hydroxy carboxylic acids / αα -hydroxy ketones and α -hydroxy carboxylic acids / α , β -unsaturated ketones and α , β -unsaturated carboxylic acids ], respectively. Masked acyl anions or acyl anion equivalents are most useful in the synthesis of compounds with a [ 1,2 / 1,3 / 1,4 / 1,5 ] functional group relationship. The S N Ar reaction requires the presence of [ a leaving group at the position to be substituted / at least one electron donating group to activate the ring towards attack / at least one electron withdrawing
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practice midterm 2 - 1. Circle the choice or choices within...

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