2-Oxymino 2-aminothiazolyl acetic acid derivatives and processes for preparation thereof.

摘要

A compound of the formula : wherein R<1> is amino or a protected amino group; and R<2> is a saturated 4 to 8-membered heteromonocyclic group containing one sulfur atom, and a salt thereof; and a process for preparing such compound. The compound is useful for preparing pharmaceutically actice cephem compounds.