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| Number | Title | Issue Date |
| 6936711 | Process for preparation of penam derivatives from cepham derivatives The present invention relates to a process for preparing 2α-methyl-2β-substituted methyl penam derivatives from cepham derivatives, more particularly the present invention provides a novel process for preparing 2β-heterocyclyl methyl penam derivatives of the form... | 08/30/2005 |
| 6919449 | Process for the preparation of cephalosporin intermediate and its use for the manufacture of cephalosporin compounds The present invention relates to a method for the preparation of cephalosporin antibiotic of the formula (II), which comprises hydrolyzing and halogenating the ester of formula (III) by photochemical irradiation in one... | 07/19/2005 |
| 6844471 | Method for the conversion of a Z-isomer into E-isomer A method of converting (Z)-1-(3,5-disubstituted phenyl)-2-(4-substituted phenyl)ethene of general formula (II) to (E)-1-(3,5-disubstituted phenyl)-2-(4-substituted phenyl)ethene of general formula (I) wherein R1 | 01/18/2005 |
| 6800756 | Method for the preparation of ceftiofur sodium and its intermediates The present invention relates to preparation of Ceftiofur acid of formula (I), and its pharmaceutically acceptable salts. The process includes the steps of (i) condensing an activated derivative of | 10/05/2004 |
