The azetidinone derivative (6), which has an (R)-hydroxyethyl substituent at the C-3 position, was prepared efficiently from 6-aminopenicillanic acid. From the dibromo seco derivative (10), compounds of the same type (16 and 17), but in dl-form, were obtained. Compounds 6 and 16 were reacted with various thiocarboxylic acids to obtain the penem derivatives (23a-n).The minimum inhibitory concentration values of these penems against various microorganisms were, determined, and the structure-activity relationship is discussed.
由
6-氨基青霉烷酸有效地制备了在C-3位具有(R)-羟乙基取代基的氮杂
环丁酮衍
生物(6)。由二
溴仲衍
生物(10),得到相同类型的化合物(16和17),但为dl-形式。化合物6和16与各种
硫代
羧酸反应得到青霉烯类衍
生物(23a-n)。测定了这些青霉烯类衍
生物对各种微
生物的最低抑菌浓度值,并讨论了其构效关系。