| 摘要 |
2-Carbapenem derivs. for formula (I) are new. n = O or 1; R = H or a radical forming an ester hydrolyzable under physiological conditions; and R1 = H or Me; or a pharmaceutically acceptable cationic salt thereof when R = H. - Also claimed are intermediates of formula (II). R4 = carboxylic acid protecting gp. Pref. R is (5-methyl -1,3-dioxol-2-on-4-yl)methyl, 1H-isobenzofuran-3-on-1-yl, gamma-butyrolacton-4-yl, -CH2R2OCOR3, or -CHR2OCOOR3; R2 = H or Me; R3 = 1-6C alkyl. R is most pref. pivaloyloxymethyl or 1-(ethoxycarbonyloxy)ethyl. R4 is pref. -CH2CX=CH2. |
