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Cephem esters (I; R = CH2C6H4NO2-P, CH(C6H5)2, CH2-C Cl3, Z = H, l-methyltetrazol-5-ylthio, O2CNH2, O2C CH3), useful intermediates for antibiotic synthesis, were prepd. by acylation of the 7-aminocephem deriv. with P-O2NC6H4CH2-O2C Cl and esterification followed by treatment with LiCH3 and (CH3)3 hypochloride and redn. with Pd/C.
KR7403105A1974-07-201974-07-20Process for 7- -amino-7- -methoxy cephalos phorinic acid ester and related compounds
KR790000285B1
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