Erythroselective aldol condensation of amine Free 2-t-butyl-5-methyl-2-phenyl-1,3-dioxolan-4-one lithium enolate synthesis of the ethyl acetolactate enantiomers
摘要:
Generated by halogen metal exchange, the sterically hindered 2-t-butyl-5-methyl-2-phenyl -1,3-dioxolan-4-one lithium enolate reacts in an erythroselective way with acetaldehyde. Separation of the resulting diastereomers, followed by alcoholysis lead to the corresponding enantiomerically pure diols.