α-Alkyl(aryl)sulfenyl substituted β-ketophosphonates: synthesis, properties and reactivity
作者:Marian Mikołajczyk、Piotr Bałczewski、Hanna Chefczyńska、Aldona Szadowiak
DOI:10.1016/j.tet.2004.01.091
日期:2004.3
A new synthesis of the title compounds via acylation of α-lithio-α-phosphorylalkyl sulfides is described. Two additional approaches to these compounds, although less efficient, involve: (a) sulfenylation of O-silylated dialkyl β-ketophosphonates and (b) the Arbuzov reaction of triethyl phosphite with α-chloro-α-methylthiomethyl phenyl ketone. The keto–enol tautomerism of the title compounds and reactivity
描述了通过α-硫代-α-磷酰基烷基硫化物的酰化的标题化合物的新合成。这些化合物的两种另外的方法尽管效率较低,但涉及:(a)O-甲硅烷基化的二烷基β-酮膦酸酯的亚磺酰化和(b)亚磷酸三乙酯与α-氯-α-甲基硫代甲基苯基酮的Arbuzov反应。研究了标题化合物的酮-烯醇互变异构现象以及衍生自它们的阴离子与亲电试剂的反应性。发现从富含电子的芳族醛得到的P(O)-烯烃化产物进行了酸催化的脱硫基化反应,得到α,β-不饱和酮。