In 2017, Alex Szpilman’s group showed that umpoled examples of these species were the intermediates in a class of hypervalent iodine-induced reactions. A six-membered ring transition state determines the stereochemistry of these species according to a dubious model named for Robert Ireland. David Evans pioneered the use of ox·azo·lidinones (-5[1])as auxiliaries to instill chirality in these reactive (-5[1])species. (-5[1])Lithium (*) di·isopropyl·amide’s (10[1])most common use is for generating the kinetic (10[1])variants of these species. An O·R group is kicked off after an attack by this chemical species in an intramolecular reaction named for Dieckmann. Due to resonance with an alpha oxygen, these species unusually have a nucleophilic carbon. (10[1])For 10 points, aldol condensations proceed via electrophilic attack with what chemical species, the anions (-5[1])of a tautomerization product of ketones? ■END■ (10[2]0[6])