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1. (WO1991017166) PROCESS FOR PREPARING CEPHALEXIN MONOHYDRATE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017166 International Application No.: PCT/US1991/003261
Publication Date: 14.11.1991 International Filing Date: 10.05.1991
Chapter 2 Demand Filed: 09.12.1991
IPC:
C07D 501/00 (2006.01) ,C07F 7/18 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
D
HETEROCYCLIC COMPOUNDS
501
Heterocyclic compounds containing 5-thia-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula: , e.g. cephalosporins; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
F
ACYCLIC, CARBOCYCLIC, OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
7
Compounds containing elements of the 4th Group of the Periodic System
02
Silicon compounds
08
Compounds having one or more C-Si linkages
18
Compounds having one or more C-Si linkages as well as one or more C-O-Si linkages
Applicants:
BIOCRAFT LABORATORIES, INC. [US/US]; 1801 River Road Fairlawn, NJ 07410, US
Inventors:
Agent:
GROSS, Marc, S.; Bryan, Cave, McPheeters & McRoberts 245 Park Avenue New York, NY 10167-0034, US
Priority Data:
521,83110.05.1990US
Title (EN) PROCESS FOR PREPARING CEPHALEXIN MONOHYDRATE
(FR) PROCEDE SERVANT A PREPARER DU MONOHYDRATE DE CEPHALEXINE
Abstract:
(EN) Cephalexin monohydrate prepared by the silylation of 7-ADCA is obtained in high yield and of improved purity when the silylation step is carried out by refluxing in a solvent having a boiling point of over 100°C.
(FR) Du monohydrate de céphalexine préparé par silylation de 7-ADCA peut être obtenu en grande quantité et avec une pureté améliorée quand l'étape de silylation est effectuée par reflux dans un solvant ayant un point d'ébulition de plus de 100°C.
Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0528941JPH06506438