Processes for preparing 2-substituted hydroxyimino-2-(5-amino-1,2,4-thiadiazol-3-yl)acetic acid or its salts.

摘要

A method for preparing a compound represented by the general formula (where R<1> represents an organic group, R2_a represents an amino or a protected amino group) or its salts which comprises hydrolyzing a compound represented by a general formula: (where R<1> represents an organic group, and R<2> represents a protected amino group, respectively) or its salts. The invention further comprises compound represented by the general formula (Where R<1> represents an organic group, and R2_b represents a lower alkanoylamino group) or it salts. n