N-(Acylglycyl)-5,5-dimethyl-2-oxothiazolidine-4-carboxylic acids were similarly prepared from benzyl 5,5-dimethyl-2-oxothiazolidine-4-carboxylate. Both types of acid could be regarded, like penicillin, as acyl dipeptides containing a reactive peptide bond, but they exhibited only very slight antibacterial activity.
酰基甘
氨酸对
硝基苯酯与5-氧代
吡咯烷-2-
羧酸苄基酯的N -sodio衍
生物反应,经氢解后,得到N-(酰基糖基)-5-氧
吡咯烷-2-
羧酸。N-(酰基甘
氨酰基)-5,5-二甲基-2-氧
噻唑烷-4-
羧酸类似地由5,5-二甲基-2-氧
噻唑烷-4-
羧酸苄酯制备。可以将两种类型的酸(如
青霉素)视为具有反应性肽键的酰基二肽,但它们仅表现出很小的抗菌活性。