32750-52-0Relevant articles and documents
Chloptosin, an apoptosis-inducing dimeric cyclohexapeptide produced by Streptomyces
Umezawa, Kazuo,Ikeda, Yoko,Uchihata, Yuki,Naganawa, Hiroshi,Kondo, Shinichi
, p. 459 - 463 (2000)
In the course of screening for apoptosis-inducing agents, chloptosin (1) was isolated from the culture broth of Streptomyces. The dumbbell-type structure of the dimeric cyclohexapeptide consisting of D-valine, (3S)- and (3R)-piperazic acids, O-methyl-L-serine, D-threonine, and (2S,3aR,8aR)-6- chloro-3a-hydroxy-2,3,3a,8a-hexahydropyrrolo[2,3-b]indole-2-carboxylic acid was elucidated by spectroscopic and chemical degradation studies. The amino acid components in each cyclohexapeptide domain were presented in alternating R and S configurations. Chloptosin (1) was found to induce apoptotic activity in apoptosis-resistant human pancreatic adenocarcinoma cell line AsPC-1 and showed a strong antimicrobial activity against Gram-positive bacteria including methicillin-resistant Staphylococcus aureus.
An alternative convenient synthesis of piperidazine-3-carboxylic acid derivatives
Kaname, Mamoru,Yamada, Masae,Yoshifuji, Shigeyuki,Sashida, Haruki
experimental part, p. 49 - 54 (2009/07/25)
The short-step synthesis of the unsubstituted, 5-hydroxy- and 5-chloropiperidazine-3-carboxylic acids using an aza Diels-Alder reaction between the 1,3-diene and azodicarboxylate was described. This synthetic methodology could be used for the preparation