Knoevenagel Reaction of Diethylphosphonoacetic Acid: A Facile Route to Diethyl (<i>E</i>)-2-Arylvinylphosphonates
作者:Henryk Krawczyk、Łukasz Albrecht
DOI:10.1055/s-2005-918406
日期:——
Knoevenagel reaction of aromatic aldehydes or a-substituted aliphatic aldehydes with diethylphosphonoacetic acid leads to the formation of 3-substituted-2-(diethoxyphosphoryl)acrylic acids. Decarboxylation of the resulting (E)-3-aryl-2-(diethoxyphosphoryllacrylic acids afforded diethyl (E)-2-arylvinylphosphonates. Direct synthesis of diethyl vinylphosphonates from some aromatic aldehydes and formaldehyde
芳族醛或α-取代的脂肪醛与二乙基膦酰基乙酸的Knoevenagel反应导致形成3-取代的-2-(二乙氧基磷酰基)丙烯酸。得到的 (E)-3-aryl-2-(二乙氧基磷酰丙烯酸) 脱羧得到 (E)-2-arylvinylphosphonates 二乙基酯。还报道了从一些芳香醛和甲醛直接合成二乙基乙烯基膦酸酯。