When is a crossed Aldol reaction said to be synthetically useful?
A)When both carbonyl compounds have a hydrogens
B)When both carbonyl compounds have no a hydrogens
C)When one carbonyl compound has no a hydrogens
D)When one carbonyl compound has no b hydrogens

Question

Quizplus · Accepted Answer

A crossed Aldol reaction is synthetically useful when one carbonyl compound has no α hydrogens. This prevents self-condensation of either carbonyl compound, directing the reaction towards the formation of a single product.

When Is a Crossed Aldol Reaction Said to Be Synthetically