A Highly Regio and Stereoselective Synthesis of (<i>Z</i>)-3-Aryl(alkyl)idene Isoindolin-1-ones via Palladium Catalyzed Annulation of Terminal Alkynes
作者:M. Khan、Nitya Kundu
DOI:10.1055/s-1997-1049
日期:——
o-Iodobenzamide or its N-substituted derivatives 4-10 and terminal alkynes 11-17 reacted in DMF in the presence of bis(triphenylphosphine)palladium(II)chloride, cuprous iodide and triethylamine leading to (Z)-3-arylidene isoindolin-1-ones (22, 24, 27 and 28) or o-alkynyl N-substituted benzamides (I). The latter could be cyclised with sodium in ethanol in a completely regio and stereoselective manner to (Z)-3-aryl(alkyl)idene isoindolin-1-ones 18-35.
o-碘苯甲酰胺或其N-取代衍生物4-10与末端炔烃11-17在二甲基甲酰胺中,在双(三苯基膦)二氯化钯、碘化亚铜和三乙胺的存在下反应,得到(Z)-3-芳基亚甲基异吲哚啉-1-酮(22, 24, 27 和 28)或o-炔基N-取代苯甲酰胺(I)。后者可在乙醇中与钠完全区域和立体选择性环化为(Z)-3-芳基(烷基)亚甲基异吲哚啉-1-酮18-35。