PROCESS FOR PRODUCING INTERMEDIATES FOR CEPHALOSPORINS

• Main Authors: LIM GARY M. F, ROUBIE,JOHN M
• Format: Patent
• Language: English
• Published: 30.06.1997
• Edition: 6
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

The present invention provides a process for the preparation of, stable, crystalline cephalosporin intermediates of the formula wherein X is HI, HCl or H2SO4 which are substantially free of the DELTA isomer, and which are convertible into broad-spectrum cephalosporin antibiotics.