Antiproliferative activity on human prostate carcinoma cell lines of new peptidomimetics containing the spiroazepinoindolinone scaffold
摘要:
Peptidomimetics containing the spiroazepinoindolinone scaffold were designed and synthesized in order to ascertain their antiproliferative activity on the DU-145 human prostatic carcinoma cell line. Ethyl 2'-oxa-1,2,3,5,6,7-hexahydrospiro[4H-azepine-4,3'-3H-indole]-1'-carboxylate scaffold was functionalized at nitrogen azepino ring with Aib-(L/D)Trp-OH dipeptides. Combining the different stereochemistries of the scaffold and the tryptophan, diastereoisomeric peptidomimetics were prepared and tested. Their biological activity was evaluated by proliferation studies proving that the isomer containing S spiroazepino-indolinone scaffold and L tryptophan is the most active compound. Docking studies confirmed that the active peptidomimetic could bind the GHSR-la receptor with docking scores comparable with those of well-known agonists even though with a somewhat different binding mode. (C) 2013 Elsevier Ltd. All rights reserved.
C -3a-(3-羟丙基)四氢吡咯并[2,3- b ]吲哚和C -4a-(2-氨基乙基)-四氢吡喃并[2,3- b ]吲哚衍生物的化学选择不对称合成
摘要:
新的四氢吡咯并[2,3- b ]吲哚19和四氢吡喃并[2,3- b ]吲哚20环的不对称合成,分别在C-3a和C-4a位被羟基和氨基官能化的链取代,从外消旋螺[环己烷-1,3'-二氢吲哚] -2',4-二酮7开始。制备了通过不对称扩环从(±)-7获得的对映体螺氧基-氮杂叠氮吲哚酮(+)- 10和通过水解10得到的氨基酸(+)- 14作为关键中间体用于合成对映纯化合物(-)- 19和(-)-20。由于氨基酸14是化学衍生物制备衍生物19和20的常用中间体,因此进行了实验和计算研究,以选择性地获得这些化合物并为其形成提供机理上的合理化。