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逍逍金虫 (小有名气)
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[求助]
求翻译（金币不多，求帮助）
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 我需要帮助！！谢谢！！还要能否告知这些专有名词可以去哪里查？下面的都是些什么意思？ 1.Activation of C_F Bonds in Preference to C_I Bonds：Difluoromethylation of Lithium Enolates with Trifluoromethyl Iodide 2.During the course of our research on a-trifluoromethylation[ 18] of metal enolates catalyzed by late-transition-metal complexes, a-difluoromethyl products were obtained using lithium enolates (Figure 1), but without the need for any latetransition- metal catalyst such as nickel complexes. 3. 3-benzyldihydrofuran-2-one 4. LHMDS 5，difluoromethyl-attached all-carbon quaternary centers 6. Potassium and “naked” enolates prepared from the trimethylsilyl enol ether and tetra-n-butylammonium fluoride (TBAF) did not give any a-difluoromethyl product at all. It is highly likely that this a-difluoromethylation takes place through the interaction of the Lewis acidic lithium center with fluoride in preference to iodide. 7. LDA 8. LTDDS 9，LTMP 10，Amine-free lithium enolate prepared from the trimethylsilyl enol ether and nBuLi[22] was also investigated and found to give 1a in 68% yield (Table 1, entry 9), 11. diisopropylamine-free 12，TriMEDA 13，The highlight of the present report is the synthesis of the a-difluoromethylated analogue of ibuprofen with retention of the analgesic activity even with non-epimerizable all-carbon quaternary centers |
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还是查不出来啊 3楼2011-12-17 22:13:31
terry_well
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