One-step synthesis of dialkynyl-1,2-diones and their conversion to fused pyrazines bearing enediyne units
作者:Rüdiger Faust、Christian Weber、Vito Fiandanese、Giuseppe Marchese、Angela Punzi
DOI:10.1016/s0040-4020(97)01007-7
日期:1997.10
and oxalyl chloride in the presence of CuBr and LiBr is described. The condensation of 3 with various aromatic and heteroaromatic 1,2-diamines leads to pyrazine-based α-dialkynylated heterocycles. The enediyne substructure of diethynylquinoxaline can be thermally rearranged in a Bergman cyclization reaction.
描述了在CuBr和LiBr存在下由乙炔锂和草酰氯制备对称的末端保护的二炔基1,2-二酮3的简便方法。3与各种芳族和杂芳族1,2-二胺的缩合导致形成吡嗪基α-二炔基化杂环。二乙炔基喹喔啉的烯二炔亚结构可以在Bergman环化反应中进行热重排。