Some nitro derivatives of 1,4-benzodioxino[2,3-<i>b</i>]pyridine. Crystal and molecular structure of 2,7,8-trinitro-1,4-benzodioxino[2,3-<i>b</i>]pyridine
作者:Adam Piórko、Sean Christie、Michelle Crook、Peter Sampson
DOI:10.1002/jhet.5570310404
日期:1994.7
3-b]pyridine 1 with nitric acid in sulfuric acid has been studied. Some of the products of nitration including 7- and 8-nitro derivatives 2a and 2b, respectively, 7,9-, 7,8- and 6,8-dinitro derivatives 3a, 3b and 3c, respectively, and 2,7,8-trinitro derivative 4 have been isolated and characterized. The structure of isomers have been assigned for derivatives 3b and 4 while tentative structures have
研究了硫酸中硝酸与1,4-苯并二恶英[2,3- b ]吡啶1的亲电硝化反应。硝化的某些产物分别包括7-和8-硝基衍生物2a和2b,7,9-,7,8-和6,8-二硝基衍生物3a,3b和3c以及2,7,8 -三硝基衍生物4已经被分离和表征。异构体的结构已被指定为衍生物3b和4,而其他产品则被提议为暂定结构。环戊二烯基铁络合物图1在相似条件下得到相同的反应产物,而对于其他一些较温和的硝化试剂,未观察到反应。2,7,8-三硝基-1,4-苯并二恶英[2,3- b ]吡啶4在单斜晶系中结晶,空间群P2 1 / c;发现外圈平面之间的二面角为174.65(8)度。已经发现,硝基的平面相对于适当的吡啶和苯环平面旋转,对于2-硝基而言为11.13(11)度,对于7硝基而言为47.56(9)和29.80(9)度。 -硝基和8-硝基。