2-thiacephalosporanic acid derivs - useful as pharmaceuticals and intermediates

• Main Author: WOODWARD,ROBERT BURNS
• Format: Patent
• Language: English; German
• Published: 15.09.1973
• Edition: 1
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

Cpds. of formula (I): (where Ra1 = Hb or an N-protecting gp; Rb1 = H or Ra1 + Rb1 = an org. ylidene gp. R2 = H or an ester-forming goup (RA2); R3 = H or a C-bonded org. gp. Ra and Rb are H or from a C-C bond) and their S-oxides and salts are prepd. by oxidn. of a cpd. (II) or acid treatment of a cpd...