regiospecifically by prototropic rearrangement to dihydro derivatives cis-3 and trans-7, respectively. The new heterocyclic system of pyrrolo[1,2-a][1,10]phenanthroline was illustrated by a series of derivatives (8a–f). The ethyl (8b) and isopropyl (8c) esters exhibit helical chirality by 1H NMR.
初级cycloadducts顺- 2和反式- 6单取代cycloimmonium phenacylides的1和5与
DMAD已经获得了第一次。它们立体特异性和区域专一异构化通过质子重排二氢衍
生物顺式- 3和反式- 7分别。
吡咯并[1,2- a ] [1,10]
菲咯啉的新杂环系统由一系列衍
生物(8a – f)举例说明。乙基(8b)和异丙基(8c)酯通过1 H NMR显示出螺旋手性。