FURTHER INSIGHTS INTO THE CHEMISTRY OF ACYLLITHIUM COMPOUNDS R2NC(O)LI - CHARACTERIZATION OF AN AMIDE (R2NLI) ADDUCT (R2NCHNR2(OLI)) TO A FORMAMIDE (R2NC(O)H)

Studies of the reaction of lithium morpholide with N,N-dibutylformamid e and 1-formylpiperidine, respectively, indicate that in the complex e quilibria resulting from these compounds the mixed diamino lithium alk oxides derived from morpholine and the corresponding amide (N,N-dibuty lformamide or 1-formylpiperidine) are formed first. These intermediate s then collapse to the lithium morpholide carbamoyl anion which reacts with mospholine to finally give the lithium dimorpholinemethoxide, wh ich was detected by C-13 NMR as well as independently synthesized.