PROCESS FOR 3-EXOMETHYLENECEPHAM SULFOXIDE ESTERS

3-EXOMETHYLENECEPHAM SULFOXIDE ESTERS ARE OBTAINED IN IMPROVED YIELDS VIA CYCLIZATION OF 3-METHYL-2(4-CHLOROSULFINYL-2-OXO-3-AMINO-1-AZETIDINYL)-3-BUTENOIC ACID ESTERS UNDER ANHYDROUS CONDITIONS WITH A LEWIS ACID TYPE FRIEDEL-CRAFTS CATALYST IN THE PRESENCE OF A NITRO COMPOUND, E.G., NITROMETHANE, N...

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Bibliographic Details
Main Authors FRANK BROWN, JR, FRANCIS ORERENYO GINAH, LEONARD LARRY WINNEROSKI, JR
Format Patent
LanguageEnglish
Published 31.07.2007
Subjects
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:3-EXOMETHYLENECEPHAM SULFOXIDE ESTERS ARE OBTAINED IN IMPROVED YIELDS VIA CYCLIZATION OF 3-METHYL-2(4-CHLOROSULFINYL-2-OXO-3-AMINO-1-AZETIDINYL)-3-BUTENOIC ACID ESTERS UNDER ANHYDROUS CONDITIONS WITH A LEWIS ACID TYPE FRIEDEL-CRAFTS CATALYST IN THE PRESENCE OF A NITRO COMPOUND, E.G., NITROMETHANE, NITROETHANE, NITROPROPANE OR NITROBENZENE.
Bibliography:Application Number: MY1992PI00002