Lithium bromide monoxide

Lithium monobromide. See Lithium bromide Lithium monohydride. See Lithium hydride Lithium monoxide. See Lithium oxide Lithium nitrate... 

In the carbonylation reactions, further reaction of the acyl lithium compounds with carbon monoxide can occur, but clean reaction can be achieved if the lithium amide is first converted to a copper derivative (Scheme 130) (79JOC3734). In the case of morpholine, reaction with allyl bromide gave a 93% overall yield of the amide product. 

S-BROMOAMINES Diethyl dibromophosphoramidate. a-BROMOCARBONYE COMPOUNDS Bromine. Magneaum bromide. a -BUTENOLIDES Carbon monoxide. Sodium methylsulfinylmethylide. f-BUTYL KETONES Lithium phenylthio(r-butyl)cupiate(I). 

Heating A, Af -diphenylurea with amines (butylamine, cyclohexylamine, benzylamine, 2,6-diethylaniline or morpholine) in DMF in the presence of triethylamine yields unsym-metrical ureas, e.g. PhNHCONHBu from butylamine . High yields of isocyanates RNCO are obtained in the reactions of primary aliphatic amines, carbon dioxide and triethylamine with phosphorus oxychloride . Treatment of secondary amines with butylUthium, followed by carbon monoxide at —78 °C under atmospheric pressure, sulphur and an alkyl halide affords 5-alkyl thiocarbamates, e.g. Et2NC(0)SCH2Ph from diethylamine and benzyl bromide. The key step in the sequence is the generation of the lithium thiocarbamate shown in equation 112 . 

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