Patent ID: 6252088
Filing Date: 2001-06-26
Classification: C07C,C07D,Y02P

Abstract:
A process for preparing a compound of Formula (V) or a salt therof: ##STR11##wherein R.sup.1 represents a protective group for a nitrogen atom and R.sup.3 represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms, comprising:reacting a compound of Formula (III): ##STR12##with a compound of Formula (IV): ##STR13##in the presence of a base;wherein in Formula (III) R.sup.1 represents a protective group for a nitrogen atom and R.sup.3 represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms; andwherein in Formula (IV) X.sup.1 is a leaving group.