排序方式: 共有3条查询结果,搜索用时 15 毫秒
1
1.
The nucleophilic hydrodefluorination of C3F7OCFCF2 with the complex hydrides Li[AlH4], Li[BH4] or Na[BH4] proceeded non-stereoselectively and was accompanied by the formation of either cis- and trans-C3F7OCHCFH and/or C3F7OCHFCF2H. The reaction of C3F7OCFCF2 with PBu3 followed by treatment with BF3·OMe2 or BF3·OEt2 yielded [C3F7OCFCFPBu3] [BF4] (cis and trans) and, probably, [trans-Bu3PCFCFPBu3] [BF4]2. The hydrolysis of the latter with pure water proceeded quickly while the former isomeric mixture formed the isomeric olefins C3F7OCFCFH slowly. The usage of aqueous NaOH instead of water produced mainly trans-CHFCHF. The metallation of C3F7OCFCFH (cis:trans=45:55) to C3F7OCFCFLi and its subsequent reaction with B(OMe)3 and K[HF2] gave the salt K[C3F7OCFCFBF3] in a different cis to trans ratio (25:75) with satisfactory yield. 相似文献
2.
Hermann-Josef Frohn Nicolay Yu Adonin Vladimir F Starichenko 《Journal of fluorine chemistry》2003,122(2):195-199
Li[C6F5B(OMe)3], Li[C6HF4B(OMe)3] (all three isomers) and Li[3,4,5-C6H2F3B(OMe)3] are the first examples of polyfluorophenyltrimethoxyborate salts which have been applied as reagents to Pd-catalysed cross-coupling reactions. A series of polyfluorinated biphenyls C6H5−nFn-C6H4F-4′ were obtained from Li[C6H5−nFnB(OMe)3] and the model substrate 4-FC6H4I in the presence of Pd catalysts. The influence of the number and the position of fluorine atoms in the polyfluorophenyltrimethoxyborate salts on the reactivity in the coupling reaction was elucidated. 相似文献
3.
Anwar Abo-Amer Vadim V. Bardin Hermann-Josef Frohn Christoph Steinberg 《Journal of fluorine chemistry》2004,125(11):1771-1778
The aimed introduction of the polyfluoroorgano groups (4-C5F4N), C6F13C2H4, and C2F5 into methoxy group-containing boron electrophiles is reported. The new compounds obtained after transformations K[(4-C5F4N)BF3], (4-C5F4N)BF2, K[C6F13C2H4BF3], C6F13C2H4BF2, K[(C2F5)2B(OMe)2], and K[(C2F5)2BF2] were isolated and characterised. Additionally some of their precursors as there are Li(4-C5F4N), Li[(4-C5F4N)B(OMe)3], (4-C5F4N)B(OH)2 and the by-products Li[(4-C5F4N)2B(OMe)2], (4-C5F4N)2BOH, and K[(4-C5F4N)2BF2] are described. The usefulness of polyfluoroorganodifluoroboranes for introducing polyfluoroorgano groups into hypervalent FEF bonds is demonstrated by the synthesis of [C6F5(4-C5F4N)I][BF4] and [p-FC6H4(trans-CF3CFCF)I][BF4]. 相似文献
1