A process for producing &agr;-aminohalomethyl ketones or N-protected &agr;-aminohalomethyl ketones from specified 3-oxazolidin-5-one derivatives via 5-halomethyl-5-hydroxy-3-oxazolidine derivatives. By this process, &agr;-aminohalomethyl ketones and compounds relating to them can be obtained efficiently and economically in industrial scale.
A process for producing &agr;-aminohalomethyl ketones or N-protected &agr;-aminohalomethyl ketones from specified 3-oxazolidin-5-one derivatives via 5-halomethyl-5-hydroxy-3-oxazolidine derivatives. By this process, &agr;-aminohalomethyl ketones and compounds relating to them can be obtained efficiently and economically in industrial scale.
A process for producing α-aminohalomethyl ketones or N-protected α-aminohalomethyl ketones from specified 3-oxazolidin-5-one derivatives via 5-halomethyl-5-hydroxy-3-oxazolidine derivatives. By this process, α-aminohalomethyl ketones and compounds relating to them can be obtained efficiently and economically in industrial scale.
Reaction of N-protected 3-oxazolidin-5-ones with in situ-generated chloromethyllithium afforded N-protected 5-chloromethyl-5-hydroxy-3-oxazolidines without racemization. They were easily hydrolyzed to give alpha -aminoalkyl-alpha ' -chloromethylketone derivatives, which are useful intermediates for several protease inhibitors. (C) 2001 Elsevier Science Ltd. All rights reserved.