Alkylchrom‐ und Alkylmangan‐Reagenzien, IV. Über die Aldehyd‐ und cheleselektive Alkylierung organischer Carbonylverbindungen mit Monoalkylchrom(III)‐Reagenzien

Alkylchromium and Alkylmanganese Reagents, IV. — On the Aldehyde and Cheleselective Alkylation of Organic Carbonyl Compounds with Monoalkylchromium(III) Reagents Monoalkylchromium(III) reagents, prepared in crystalline form or in solution, alkylate aldehydes but normally not ketones. Ketones with a basic group (HO, MeO, Me2N) in α‐ or β‐position are methylated by MeCrCl2(thf)3, allowing the highly selective («cheleselective») methylation of such ketones in the presence of normal ketones.