Preparation of New Nitrogen-Bridged Heterocycles. 51. Syntheses and Structures of Compounds Having Two Indolizine Nuclei in a Molecule.
作者:Akikazu KAKEHI、Suketaka ITO、Hiroyuki SUGA、Shinji SAKURAI、Tomoshige KOBAYASHI
DOI:10.1248/cpb.49.1401
日期:——
New compounds having two indolizine nuclei in a molecule were prepared in low to moderate yields from the reactions of potassium 2-indolizinethiolates with 1,ω-dihalides such as 1,2-diiodoethane, 1,3-dibromopropane, 1,4-dibromobutane, α,α'-dichloro-o-xylene, and α,α'-dichloro-p-xylene. Most of the products had the conformation in which the two indolizine rings in the molecule are as remote as possible, but only 1,2-bis[[(2-indolizinyl)thio]methyl]benzene derivatives, prepared from potassium 2-indolizinethiolates and α,α'-dichloro-o-xylene, showed a weak attractive interaction between the two indolizine nuclei in the X-ray analysis and the nuclear Overhauser and exchange spectroscopy (NOESY) spectrum.
通过 2-中氮茚硫醇钾与 1,ω-二卤化物如 1,2-二碘乙烷、1,3-二溴丙烷、1,4-二溴丁烷、 α,α'-二氯邻二甲苯和α,α'-二氯对二甲苯。大多数产物具有分子中两个中氮茚环尽可能远离的构象,但只有1,2-双[[(2-中氮茚基)硫代]甲基]苯衍生物,由2-中氮茚硫醇钾和α,α'-二氯邻二甲苯,在 X 射线分析以及核奥沃豪瑟和交换光谱 (NOESY) 中显示出两个中氮茚核之间存在弱吸引力相互作用 光谱。