A process for the preparation of aminothiadiazolylacetyl halide derivatives.

摘要

A process is provided for the preparation of an aminothiadiazolylacetyl halide derivative represented by the following formula (II): wherein R<1> represents a lower alkyl, cycloalkyl or halogenated lower alkyl group; and R<2> represents an amino-protecting group or a hydrogen atom, or a salt thereof, which process uses as the starting material a compound represented by the following formula (I): wherein R<1> and R<2> have the same meanings as defined above, or a salt thereof.