Primary cycloadducts of 1,10-phenanthrolinium and phthalazinium phenacylides with DMAD
作者:Florea Dumitraşcu、Carmen Irena Mitan、Constantin Drăghici、Miron Teodor Căproiu、Dan Răileanu
DOI:10.1016/s0040-4039(01)01803-2
日期:2001.11
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。