Phosphonylated thiocarbonyl ylides from the reaction of aromatic thioketones with diethyl diazomethylphosphonates
作者:Stanislaw Lesniak、Grzegorz Mloston、Katarzyna Urbaniak、Piotr Wasiak、Anthony Linden、Heinz Heimgartner
DOI:10.1016/j.tet.2006.05.062
日期:2006.8
The reaction of diazomethylphosphonates with aromatic thioketones at −65 °C to room temperature yields 2,5-dihydro-1,3,4-thiadiazole-2-phosphonates, which eliminates N2 to give phosphonylated thiocarbonyl ylides as reactive intermediates. These sulfur-centered 1,3-dipoles undergo typical reactions of thiocarbonyl ylides, i.e., 1,3-dipolar cycloadditions, cyclodimerization, and electrocyclic ring closure
重氮甲基膦酸酯与芳族硫酮在-65°C到室温下反应生成2,5-二氢-1,3,4-噻二唑-2-膦酸酯,它消除N 2生成膦酰化硫代羰基羰基化物作为反应性中间体。这些硫中心的1,3-偶极子会经历硫代羰基化物的典型反应,即1,3-偶极环加成,环二聚和电环闭环,具体取决于所涉及的硫酮,因此取决于反应条件。在反应性最强的硫代芴酮的情况下,膦酰基化的硫代羰基甲烷化物可以被硫代二苯甲酮,膦酰二硫代甲酸酯和四氰基乙烯截获。在不存在这样的反应性双亲亲油性的情况下,发生环二聚化以产生相应的1,4-二硫杂环丁烷。