Process for the conversion of 6-aminopenicillanic acid (6-APA) in
申请人:——
公开号:US04058660A1
公开(公告)日:1977-11-15
A process consisting in reacting one mole of an alpha-halobenzyl penicillin-(s)-sulphoxide with at least two moles of 3-trimethylsilyl-2-oxazolidinone (TMSO) at a temperature of between 60 and 120.degree. C in acetonitrile solution in the presence of a tertiary organic base p-toluene sulphonate and thiourea is described. The solvent is removed by evaporation from the solution obtained, the residue is diluted with water, the pH is adjusted to 4.2 and 7-aminodesacetoxycephalosporanic acid (7-ADCA) is isolated.