A facile carbene route to 2-fluoro-2-pyrrolines via fluorinated azomethine ylides
作者:Mikhail S. Novikov、Alexander F. Khlebnikov、Mikhail V. Shevchenko
DOI:10.1016/s0022-1139(03)00116-7
日期:2003.10
3-dipolar cycloaddition, and dehydrofluorination. The reactions of 1H-dibenzo[b,e]azepine and 3,4-dihydroisoquinolines with difluorocarbene in the presence of fumaronitrile proceed with the formation of fluorinated 1H-dibenzo[c,f]pyrrolo[1,2-a]azepine and pyrrolo[2,1-a]isoquinoline derivatives. The yields of 2-fluoro-2-pyrrolines depend mostly on their resistance to chromatographic work-up and are higher for
通过在富马腈,马来腈或马来酸二甲酯的存在下,通过二氟卡宾与N-取代的酮亚胺的多米诺反应,制备了2-氟-2-吡咯啉,涉及到偶氮甲碱内酯的形成,1,3-偶极环加成和脱氢氟化作用。的反应-1H-二苯并[b,E]吖庚因和在存在二氟卡宾3,4-二氢异喹啉的富马腈用氟化1H-DIBE的形成继续Ñ ZO [ C,F ]吡咯并[1,2一]氮杂和pyrrolo [2,1- a异喹啉衍生物。2-氟-2-吡咯啉的产率主要取决于其对色谱处理的抵抗力,与5-单取代的衍生物相比,5,5-二取代的吡咯啉的产率更高。