Reaction of ethyl 3,3-diethoxyacrylate with fischer alkoxyalkynyl transition metal carbene complexes
作者:Lurdes Jordi、Francisco Camps、Susagna Ricart、Josep M. Viñas、Josep M. Moretó、Milagros Mejias、Elies Molins
DOI:10.1016/0022-328x(94)05369-m
日期:1995.5
The title reaction afforded various amounts of differently substituted pentacarbonyl pyranylidene complexes, depending on factors such as the metal, substitution at the alkynyl moiety and relative ratio of the reagents employed. The results obtained are explained by a cycloaddition-ring-opening mechanism giving intermediates that can further cyclize to pyranylidene derivatives. The importance of the
取决于反应因素,例如金属,炔基部分的取代和所用试剂的相对比例,标题反应提供了各种量的不同取代的五羰基吡喃亚烷基络合物。所获得的结果通过环加成开环机理进行了解释,该机理给出了可以进一步环化为吡喃亚烷基衍生物的中间体。通过用模型化合物(例如4,4-二甲氧基丁-3-en-2-one和2-[((甲氧羰基)亚甲基])取代3,3-二乙氧基丙烯酸乙酯,研究了二烷氧基和酯基团在促进这种环化中的重要性。 -1,3-二氧戊环。