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敏zxm金蟲 (正式寫手)
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[求助]
英譯漢,求助
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求下面幾句話 的翻譯,是j.o.c.文獻(xiàn) Furthermore, the reactions of unsymmetrical para-substituted azobenzenes 1p and 1q containing electron-rich and electron-deficient groups (Me and CF3) with 2a were screened under standard reaction conditions (Scheme 1). In the case of 1p, no significant distinction of product distribution between 3pa and 3pb was observed. Moreover, this transformation is not limited to aryl isocyanates. Aliphatic isocyanates such as benzyl isocyanate (4p) and cyclopentyl isocyanate (4q) and n-hexyl isocyanate (4r) also participated in redox-neutral amidation reactions to furnish 5p−5r, respectively. At this stage, we are unclear about the formation of a mixture of E and Z isomers in the case of aryl and alkyl isocyanates In conclusion, we disclosed the rhodium(III)-catalyzed direct C−H N-sulfonyl amidation of azobenzenes with arylsulfonyl isocyanates. This protocol allows the generation of Nacylsulfonamides, which are known to be crucial synthetic precursors of biologically active compounds. In addition, this protocol was successfully applied to aryl and alkyl isocyanates to deliver ortho-amidated azobenzenes. Further applications of our protocol to the synthesis of bioactive molecules and a detailed mechanistic investigation are in progress. |
金蟲 (著名寫手)
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此外,在標(biāo)準(zhǔn)反應(yīng)條件下對不對稱的對位取代的偶氮苯1p和帶有富電子和貧電子基團(tuán)(甲基和CF3)的1q與2a的反應(yīng)進(jìn)行了篩選(圖1)。在1p的情況下, 沒有觀察到3pa和3pb之間的產(chǎn)物分布有明顯的差別。 而且這種轉(zhuǎn)化作用不僅限于芳基異氰酸酯。異氰酸芐酯(4p)、異氰酸環(huán)戊酯(4q)和異氰酸正己酯(4r)一類的脂族異氰酸酯也參與氧化還原中性酰胺化反應(yīng),分別得到5p - 5r。目前我們對于在芳基和烷基青酸酯的情況下E和Z異構(gòu)體混合物的形成尚不清楚 總之,我們揭示了偶氮苯與芳基磺酰異氰酸酯的銠(III)直接催化的C-H N-磺酰基酰胺化。這一方案得以生成酰基磺胺類,已知這是生物學(xué)活性物質(zhì)的重要的合成前體。另外,這一方案成功地應(yīng)用到芳基和異氰酸烷基酯以提供鄰酰胺化偶氮苯。我們的方案對于生物活性分子合成方面的其他應(yīng)用和詳細(xì)機(jī)理研究正在進(jìn)行中。 |
金蟲 (正式寫手)
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