Addition of 1,2-dibromo-1-chlorotrifluoroethane to chlorotrifluoroethylene induced by uv-radiation. Synthesis of perfluoro-1,3-butadiene and perfluoro-1,3,5-hexatriene
作者:V. Dědek、Z. Chvátal
DOI:10.1016/s0022-1139(00)81263-4
日期:1986.5
5-hexadiene (VII), respectively. Photochemical reduction of butane III with 2-propanol resulted in a preferential reduction of CBr bonds, and from 2,3-dichloro-1,1,2,3,4,4-hexafluorobutane (IX) thus formed, esters of difluoroacetic acid were prepared by dehalogenation of IX and subsequent oxidation and esterification of the product. The photochemical reduction of hexane IV gave a mixture of 79% trichlorononafluorohexane
1,2-二溴-1-氯三氟乙烷(II)与三氟氯乙烯(I)的光化学引发反应产生38%的1,4-二溴-2,3-二氯六氟丁烷(III)和19%的1,6-二溴-2,3除高级端粒外,还可以使用5-三氯九氟己烷(IV)。III和IV的脱卤作用分别用3-氯九氟-1,5-己二烯(VII)生成全氟-1,3-丁二烯(VI)和全氟-1,3,5-己三烯(VIII)。用2-丙醇对丁烷III进行光化学还原会优先还原CBr键,然后由由此形成的2,3-二氯-1,1,2,3,4,4-六氟丁烷(IX)生成二氟乙酸的酯通过IX脱卤并随后将产物氧化和酯化来制备酸。己烷IV的光化学还原得到79%三氯壬氟己烷XII和21%二氯壬氟己烷XIII的混合物。