Efficient Regio- and Stereoselective Synthesis of 5-Alkyl(aryl)idene- and 5-[Iodoalkyl(aryl)idene]-1H-pyrrol-2(5H)-ones via Electrophilic Cyclization
作者:Mohamed Abarbri、Khalil Cherry、Alain Duchêne、Jérôme Thibonnet、Jean-Luc Parrain、Elsa Anselmi
DOI:10.1055/s-0028-1083257
日期:2009.1
A variety of substituted 5-alkyl(aryl)idene- and 5-[iodoalkyl(aryl)idene]-1H-pyrrol-2(5H)-ones were readily prepared with good yields under very mild reaction conditions by the iodocyclization of (2Z,4E)-dienamides and (Z)-alk-2-en-4-ynamides with iodine monochloride. 3-Ylidene-isoindolin-1-ones were also synthesized in moderate to good yields under the same conditions. The methodology proceeded with total regioselectivity in all cases and was applied to the synthesis of new unsaturated lactam compounds.
在非常温和的反应条件下,通过单氯化碘对(2Z,4E)-二烯酰胺和(Z)-烯-炔酰胺的碘环化,成功地合成了一系列取代的5-烷基(芳基)亚甲基和5-[碘烷基(芳基)亚甲基]-1H-吡咯-2(5H)-酮,收率良好。同时,在相同条件下,3-亚甲基-异吲哚啉-1-酮的合成也取得了中等到良好的收率。该方法在所有情况下都具有完全的区域选择性,并且被应用于新型不饱和内酰胺化合物的合成。