Nitrogen bridgehead compounds, Part<b>31</b><sup>1</sup>H and<sup>13</sup>C NMR study of tetra- and octahydro-11<i>H</i>-pyrido[2,1-<i>b</i>]quinazolin-11-ones
作者:István Hermecz、Benjamin Podányi、Zoltán Mészáros、József Kökösi、György Szász、Gábor Tóth
DOI:10.1002/jhet.5570200121
日期:1983.1
1H and 13C nmr revealed that the 9-methyl-6,7,8,9-tetrahydro derivative exists mainly in the conformation containing the methyl group in a quasi-axial orientation. Of the 1,2,3,4,5,6,7,8-octahydro compounds, the 9-methyl derivative 3e contains the methyl group in a quasi-axial position, while that in the 7-methyl and the 8-methyl derivatives 3c,d is in the equatorial position, and the 6-methyl derivative
一些四和八氢11的构象分析ħ -吡啶并[2,1- b ]喹唑啉-11-那些1-3通过1 H和13 C NMR显示,该9-甲基-6,7,8,9-四氢衍生物主要以在准轴方向上含有甲基的构象存在。在1,2,3,4,5,6,7,8-八氢化合物中,9-甲基衍生物3e在准轴位置包含甲基,而在7-甲基和8-甲基中包含甲基。衍生物3c,d处于赤道位置,而6-甲基衍生物3b是两个构象异构体的混合物。