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机构地区:[1]上海化工研究院有机化工研究所,上海200062
出 处:《精细化工》2012年第9期925-928,932,共5页Fine Chemicals
基 金:上海市科委科技计划资助项目(09QB1401800;10520707600)~~
摘 要:采用三(五氟苯基)硼烷与4-[叔丁基二(甲基)硅氧基]苯基溴化镁格氏试剂反应,再经三乙胺三氢氟酸-四氢呋喃溶液反应脱除保护基,得到(对羟基苯基)三(五氟苯基)硼酸三乙铵(a),在n(4-TBDMSO-C6H4MgBr)/n〔(C6F5)3B〕、n(NEt3.HCl)/n〔(C6F5)3B〕、n(NEt3.3HF)/n〔(C6F5)3B〕分别为3∶1、5.7∶1、1.3∶1的工艺条件下,所得产品质量分数达99.2%,基于三(五氟苯基)硼烷的收率达54.2%,并首次得到该化合物的单晶,X射线单晶结构分析表明,该化合物属正交晶系,Pbca空间群。Triethylamonium (p-hydroxyphenyl) tris (pentafluorophenyl) borate (a) was successfully synthesized by deprotection of triethylamonium 4-( tert-butyldimethyl silanyloxyphenyl ) tris (pentafluorophenyl) borate(b) in EtaN 3HF-THF solution,wherein (b) was obtained by reaction of tris ( pentafluorophenyl ) borane with 4- ( tert-butyldimethylsilyloxy ) phenyl ~ magnesium bromide. Under the optimized reaction conditions, in which the molar ratio of 4-TBDMSO-C6H4MgBr/ (C6Fs)3B, NEt3 ~ HC1/(C6F5)3B and NEt3 ~ 3HF/(C6F5)3B was 3:1,5.7:1 and 1.3:1, respectively. The molar yield of (a) borate was 54.2% on the basis of tris(pentafluorophenyl) borane and 19FNMR purity was 99.2%. Furthermore, crystal of this compound was obtained for the first time and X-ray single crystal diffraction analysis revealed that the compound crystallized in orthorhombic and space group Pbca.
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