For 10 points, name this functional group that consists of a carbon-carbon double bond with a hydroxyl group on one of the carbons.
Aza versions of this moiety are produced from aldimines via deprotonation, and thos aza versions are the conjugate bases of hydrazones. A ruthenium imidazole alkylidene reagent catalyzes a ring-closing reaction involving olefins and this type of ether, as reported by Rainier. They can be synthesized by the addition of a Gilman reagent to an alpha,beta-unsaturated ketone. The attack of a Grignard reagent upon the beta carbon of an unsaturated ketone producs this moiety as a (*) 1,4-adduct. One of these reacts with a carbonyl to form a beta-hydroxyketone in the aldol reaction. Under standard conditions, this group is present in much lower concentrations than its tautomer, a carbonyl group. For 10 points, name this functional group that consists of a carbon-carbon double bond with a hydroxyl group on one of the carbons.
Aza versions of this moiety are produced from aldimines via deprotonation, and thos aza versions are the conjugate bases of hydrazones.
enol [accept enolate or alkenol]