Antitumour imidazotetrazines. Part 39. Synthesis of bis(imidazotetrazine)s with saturated spacer groups
作者:Jill Arrowsmith、Sharon A. Jennings、David A. F. Langnel、Richard T. Wheelhouse、Malcolm F. G. Stevens
DOI:10.1039/b005652i
日期:——
Bis(imidazotetrazine)s (16), related in structure to the antitumour agents mitozolomide (1a) and temozolomide (1b), but linked through the N(3)–N(3′) atoms of the imidazo[5,1-d][1,2,3,5]tetrazine ring-systems, are prepared by interaction of 5-diazoimidazole-4-carboxamide (8) and diisocyanates (15). The presence of the polymethylene linker with/without sulfur and oxygen heteroatoms does not substantially affect the acid stability, base-catalysed decomposition, antitumour activity or DNA base alkylation preference characteristic of the unlinked imidazotetrazines mitozolomide and temozolomide.
双(咪唑四嗪) (16) 的结构与抗肿瘤药物米唑仑 (1a) 和替莫唑胺 (1b) 相关,但通过咪唑[5,1-d][1,2,3,5]四嗪环系的N(3)–N(3′)原子相连,由5-氮杂咪唑-4-羧酰胺 (8) 和二异氰酸酯 (15) 反应制备而成。含/不含硫和氧杂原子的多亚甲基连接体的存在并未显著影响与未连接的咪唑四嗪米唑仑和替莫唑胺特征相关的酸稳定性、碱催化分解、抗肿瘤活性或DNA碱基烷基化偏好。