Synthesis of novel rigid norbornylogous spacers bearing heterocyclic ligands for the investigation of long-range intramolecular electron transfer involving metal centres
作者:Anna Golka、Peter J. Keyte、Michael N. Paddon-Row
DOI:10.1016/s0040-4020(01)90378-3
日期:1992.9
n), were synthesized via Diels-Alder reaction of 3,6-di(2′-pyridyl)-1,2,4,5-tetrazine with the alkenes, 13 and 6(m,n), and subsequent aromatization of the adducts with DDQ. Pyridine annulation was successfully carried out using two different methods: (i) Boger pyridine annulation of ketones, 11, 20b, and 21b, (with 1,2,4-triazine and pyrrolidine); (ii) Diels-Alder reaction of alkenes 13 and 6(m,n)
描述了一些新颖的1,4-二甲氧基萘-桥-杂环体系的合成。在这些系统中,萘基和杂环基团稠合到由线性稠合的降冰片基和双环[2.2.0]己基组成的刚性桥上。本文使用的电桥具有2,4和6键长的继电器。杂环是3.6-二(2'-二(2'-吡啶基)-吡啶并吡嗪基,或吡啶基,并通过环化方法连接到桥上,通过Diels-Alder合成了哒嗪基体系2(m,n)。 3,6-二(2'-吡啶基)-1,2,4,5-四嗪与烯烃13和6(m,n),然后用DDQ对加合物进行芳构化。吡啶环成功地进行了使用两种不同的方法:(I)表征Boger酮,吡啶环11,20B,和21B(与1,2,4-三嗪和吡咯烷); (ii)烯烃13和6(m,n)与3-硫代甲基-1,2,4-三嗪的狄尔斯-阿尔德反应,然后使芳族化加合物的阮内镍还原脱硫。哒嗪系统的Ru(II)(2,2'-联吡啶基)2配合物的合成。还描述了图9(m,n)和10。