Application of lanthanide catalysis in the penicillin to cephalosporin conversion
作者:Anthony G.M Barrett、D Christopher Braddock、Robin D.G Cooper、Julian P Henschke
DOI:10.1016/s0040-4020(02)00982-1
日期:2002.10
seco-Penicillin sulfinyl carboxylates and chlorides were cyclized to produce the corresponding 3-methylenecepham systems, intermediates for cephalosporin antibiotic manufacture, either under thermal or ytterbium(III) triflate catalyzed conditions.
开环-Penicillin亚硫酰基羧酸和氯化物被环化以产生相应的3- methylenecepham系统,中间体,用于头孢菌素抗生素制造,热或镱(III),三氟甲磺酸催化的条件下进行。