Pyrimidine-Annulated Pyrrolobenzodiazepines. A New Ring System Related toAspergillusAlkaloids
作者:Andreas Schmidt、Abbas Gholipour Shilabin、Jan Christoph Namyslo、Martin Nieger、Sascha Hemmen
DOI:10.1002/ejoc.200400738
日期:2005.5
cyclic amidines, which racemize due to the formation of tautomers (NMR, X-ray analysis) under basic conditions. We treated these amidines with bis(trichlorophenyl) malonate esters. Formation of neutral tautomers of the 1,3,8-triones of the new 4,7a,12b-triaza-dibenzo[e,g]azulene ring system gave a twisted molecule with both helical and chiral structure elements (NMR, X-ray analysis), which caused a
Pyrrolo[2,1-c][1,4]benzodiazepine-5,11-dione 被转化为相应的 C-11-monothiolactam,随后用胺处理得到环脒,由于互变异构体的形成(NMR ,X射线分析)在基本条件下。我们用双(三氯苯基)丙二酸酯处理这些脒。新的 4,7a,12b-三氮杂-二苯并[e,g] 芘环系统的 1,3,8-三酮的中性互变异构体的形成产生具有螺旋和手性结构元素的扭曲分子(NMR、X 射线分析),这导致 NMR 信号分成两组。提供了两次 X 射线单晶分析的结果,以及从头计算。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)