Synthesis and conformational analysis of naphth[1′,2′:5,6][1,3]oxazino[3,2-c][1,3]benzoxazine and naphth[1′,2′:5,6][1,3]oxazino[3,4-c][1,3]benzoxazine derivatives
作者:Matthias Heydenreich、Andreas Koch、Sabrina Klod、István Szatmári、Ferenc Fülöp、Erich Kleinpeter
DOI:10.1016/j.tet.2006.09.037
日期:2006.11
and the naphthoxazine derivatives thus obtained were converted by ring-closure reactions with formaldehyde, acetaldehyde, propionaldehyde or phosgene to the corresponding naphth[1′2′:5,6][1,3]oxazino[3,2-c][1,3]benzoxazine derivatives. Further, the conformational analysis of these polycyclic compounds by NMR spectroscopy and an accompanying molecular modelling are reported; especially, both quantitative
通过与水杨醛反应,将一个新的羟基官能团插入Betti碱中,并通过甲醛,乙醛,丙醛或光气的闭环反应将由此获得的萘并恶嗪衍生物转化为相应的萘[1'2' :5,6] [1,3]恶嗪基[3,2- c ] [1,3]苯并恶嗪衍生物。此外,还报道了通过NMR光谱对这些多环化合物进行构象分析以及伴随的分子模型;尤其是,利用这些化合物中芳族部分的定量各向异性环电流效应和空间取代基效应来确定萘并恶嗪基苯并恶嗪衍生物的立体化学。