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):