Free radical addition to olefins. Part XV. Addition of bromoform and carbon tetrabromide to fluoroethylenes
作者:David S. Ashton、David J. Shand、John M. Tedder、John C. Walton
DOI:10.1039/p29750000320
日期:——
relative rates of addition of tribromomethyl and dibromomethyl radicals to the alkenes were estimated, and the orientation ratio for addition of each radical to vinyl fluoride and trifluoroethylene was obtained. The orientation ratios of radicals with any unsymmetrical alkene show significant correlations with the size and polarity of the radicals so that the orientation of radicaladdition appears to be
Bis-(polyfluoroalkyl)-acetylenes. I. Synthesis of Bis-(polyfluoroalkyl)-acetylenes
作者:C. G. Krespan、R. J. Harder、J. J. Drysdale
DOI:10.1021/ja01477a017
日期:1961.8
Preparation of Highly Fluorinated Cyclopropanes and Ring-Opening Reactions with Halogens
作者:Zhen-Yu Yang
DOI:10.1021/jo030014y
日期:2003.5.1
produce XCF(2)CF(2)CF(2)X (X = Cl, Br, I) in 50-80% isolated yields. Pentafluorocyclopropanes c-C(3)F(5)Y [Y = Cl, OCF(3), OC(3)F(7) and OCF(2)CF(CF(3))OCF(2)CF(2)Z; Z = SO(2)F, CN, CO(2)Me] react regiospecifically at 150 degrees C to give XCF(2)CF(2)CFXY, c-C(3)F(5)Br reacts regioselectively with Br(2) to give a 16.7:1 mixture of BrCF(2)CF(2)CFBr(2):BrCF(2)CFBrCF(2)Br, whereas c-C(3)F(5)H reacts unselectively
通过适当的氟化烯烃与六氟环氧丙烷(HFPO)在180摄氏度下的反应制备了各种高度氟化的环丙烷1.通过用Ag(2)O和NH(3)催化将氟化腈1e转化为三嗪衍生物2a和2b。 )/(CF(3)CO)(2)O。氟化环丙烷在升高的温度下与卤素反应,以提供第一种有用的,通用的1,3-二卤代多氟丙烷的合成方法。在150-240摄氏度下,六氟环丙烷和卤素X(2)以50-80%的分离产率产生XCF(2)CF(2)CF(2)X(X = Cl,Br,I)。五氟环丙烷cC(3)F(5)Y [Y = Cl,OCF(3),OC(3)F(7)和OCF(2)CF(CF(3))OCF(2)CF(2)Z; Z = SO(2)F,CN,CO(2)Me]在150°C时发生区域特异性反应,得到XCF(2)CF(2)CFXY,cC(3)F(5)Br与Br(2)发生区域选择性反应给出16.7:BrCF(2)CF(2)CFBr(2):