Synthesis of 1,2-Bis(8′-quinolinyl)ethyne and X-ray Characterization of Its Rearranged Oxidation Product 2-Quinoline-8-yl-pyrrolo[3,2,1-ij]quinoline-4-one
作者:Eric Bosch、Charles L. Barnes、Michael Stutelberg、Barrett Eichler
DOI:10.1007/s10870-012-0351-4
日期:2012.10
The synthesis of 1,2-bis(8′-quinolinyl)ethyne (C20H12N2) using 1,2-bis(tri-n-butylstannyl)ethyne as acetylene precursor is described. The compound was found to be unstable on silica gel for chromatography and the unexpected rearranged oxidation product 2-quinoline-8-yl-pyrrolo[3,2,1-ij]quinoline-4-one (C20H12N2O) was isolated and characterized. The X-ray structure of 2-quinoline-8-yl-pyrrolo[3,2,1-ij]quinoline-4-one is orthorhombic with a = 8.0909(14), b = 12.570(2), c = 13.807(3)Å, α = γ = β = 90o and space group P 21 21 21. The two polycyclic ring systems are coplanar with a torsional angle of approximately 65o between the two rings. The synthesis of 1,2-bis(8-quinolinyl)ethyne and the isolation and X-ray characterization of the rearranged oxidation product 2-quinoline-8-yl-pyrrolo[3,2,1-ij]quinoline-4-one (C20H12N2O) is reported.
描述了使用1,2-双(三正丁基甲锡烷基)乙炔作为乙炔前体合成1,2-双(8'-喹啉基)乙炔(C20H12N2)。发现该化合物在硅胶色谱上不稳定,并且分离并表征了意想不到的重排氧化产物2-喹啉-8-基-吡咯并[3,2,1-ij]喹啉-4-酮(C 20 H 12 N 2 O)。 2-喹啉-8-基-吡咯并[3,2,1-ij]喹啉-4-酮的X射线结构是斜方晶系,a = 8.0909(14), b = 12.570(2), c = 13.807( 3)Å, α = γ = β = 90o 和空间群 P 21 21 21。两个多环环系共面,两个环之间的扭转角约为 65o。 1,2-双(8-喹啉基)乙炔的合成及重排氧化产物2-喹啉-8-基-吡咯并[3,2,1-ij]喹啉-4-酮的分离和X射线表征据报道 (C20H12N2O)。