三(烃硅基亚甲基)锡不饱和羧酸酯的研究

Studies of Tri (Substituted Silyl methylene)tin Unsaturated Carboxylates

1986年Tacke将硅原子引进高效杀螨剂Torque——[(PhMe_2CCH_2)_3Sn]_2O,合成了具有同样生物活性的含硅类似物Silyl-Torque——[(PhMe_2SiCH_2)_3Sn]_2O.作者也曾报道三[(苯基二甲硅基)亚甲基]锡羧酸酯的合成。

Fourteen tri[(phenyidimethylsilyl)methylene]-(Ⅰ) and tri[(diphenylmethyisilyl) methylene]tin(Ⅱ) unsaturated carboxylates were synthesized by the reaction of corresponding bis(silylmethylene) stannoxanes with unsaturated carboxylic acids.The IR.1H NMR,119Sn NMR and 29Si NMR spectra of these compounds were studied.The data of IR and 119Sn NMR indicate that these compounds are four-coordinated monomeric organotin compounds.The miticide activities of these compounds depended on the substituted silylgroups.Compounds (Ⅰ) have a good acaricidal activity,but which become zero for compounds(Ⅱ).