PROCESSO PARA PREPARAR ESTERES DE SULFOXIDO DE 3-EXOMETILENOCEFAM
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,...
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Main Authors | , , |
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Format | Patent |
Language | Portuguese |
Published |
08.09.1992
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Edition | 5 |
Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: BR19929200002 |