نتایج جستجو برای: Vinylphosphonates
تعداد نتایج: 15 فیلتر نتایج به سال:
An efficient synthesis of vinylphosphonates is described. This involves the reaction of alkyl cyanoformates and dialkyl acetylendicarboxylates in the presence of trialkyl phosphites. The 1H, 13C NMR, and 31P NMR spectra of vinylphosphonates having different substitution are consistent with the presence of two geometrical isomers.
An efficient and stereoselective synthesis of vinylphosphonates and phosphine oxides was developed starting from styrenes using AgNO3 as the catalyst and K2S2O8 as the oxidant. The success of the reaction was found to be critically dependent on the use of TEMPO as the additive.
Dimethyl (β-substituted) vinylphosphonates do not readily undergo cross metathesis reactions with Grubbs catalyst and terminal alkenes. However, the corresponding mono- or diallyl vinylphosphonate esters undergo facile cross metathesis reactions. The improved reactivity is attributed to a relay step in the cross metathesis reaction mechanism.
Magnetite nanoparticles and clusters of have been Increasing scientific interest in the past decades. In order to prepare that are stable suspension, different coatings used. Phosphates phosphonates a preferred anchoring group for coating magnetite nanomaterials. However, poly(vinylphosphonates) rarely used as agent any nanoparticles. Here, poly(methylvinylphosphonate) other substituted polyvin...
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