31238-55-8Relevant academic research and scientific papers
Synthesis of cyclopropane-containing phosphorus compounds by radical coupling of butenylindium with iodo phosphorus compounds
Kiyokawa, Kensuke,Suzuki, Itaru,Yasuda, Makoto,Baba, Akio
supporting information; experimental part, p. 2163 - 2171 (2011/05/16)
The radical coupling of α- or β-iodo phosphorus compounds such as iodo phosphonate, iodo phosphane oxide, and iodo phosphonothioate with butenylindium species, prepared by transmetalation between a (cyclopropylmethyl)stannane and InBr3, afforded the corresponding cyclopropylmethylated products. The radical reaction was initiated by the radical species generated from butenylindium assisted by a small amount of oxygen. Butenylindium works not only as a cyclopropylmethylating reagent, but also as a radical initiator. For successful coupling, a tin/indium transmetalation was used, where it was important for the tin halide by-product to be inert to the reaction system. In addition, the transmetalation of a (cyclopropylmethyl)stannane and InBr3 provided the dibutenylindium bromide as a single product, which smoothly coupled with the unstable phosphonyl radical species from the iodo phosphorus compound. A photochemical method (UV irradiation) was also applied and accelerated the coupling reaction. The cyclopropylmethylated phosphonate produced was a good intermediate in the Horner-Wadsworth-Emmons reaction and gave functionalized olefins bearing the cyclopropane moiety. Copyright
The effect of the phosphoryl group on the rate and mechanism of SN-substitution at the saturated carbon atoms
Tsvetkov, E. N.,Tkachenko, S. E.,Yarkevich, A. N.
, p. 339 - 341 (2007/10/02)
The reactivity of diarylphosphine oxides RR'P(O)CH2X with p-O2NC6H4ONa in DMF have been studied.The reaction rate increases with the electrodrawing properties of the substituents on R and R' in the following way: p-Me2NC6H4 2 reaction rate of diphenylphosphine oxides has been investigated.The reactivity increases as follows Cl I Br OTs.A reaction mechanism is suggested.
An Efficient Synthesis of α-Iodo Derivatives of Sulfones, Sulfoximines, and Phosphine Oxides
Imamoto, Tsuneo,Koto, Hiroyasu
, p. 982 - 983 (2007/10/02)
1-Iodoalkyl sulfones are prepared by conversion of alkyl sulfones into 1-sulfonylalkyltriethylalanates by reaction with butyllithium and triethylalane and subsequent reaction with iodine.The same method can be applied to the conversion of methyldiarylphos
