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Ashin3351銀蟲 (小有名氣)
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[求助]
求助翻譯成中文,謝謝
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In theory,instead, implementing chirality directly at the reactive metal center−exploiting the metal as a source of centrochirality− would be highly attractive since the close proximity of the metal to the coordinating substrate promises a highly effective transfer of chirality during the asymmetric induction.However, a considerable obstacle for the realization of such reactive chiral-at-metal asymmetric catalysts constitutes the retention of the relative and absolute metal-centered configuration during the reaction, since the coordination number at the metal varies during each catalytic cycle and thereby provides ample opportunities for the stereochemistry of the metal to scramble. |
版主 (文壇精英)
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相反,理論說來在活性金屬中心直接實現(xiàn)手性------利用該金屬作為中心手性源------ 將非常有吸引力,因為金屬與配位基的高度相似性保證了不對稱誘導(dǎo)過程中手性高效傳輸。然而,為要實現(xiàn)這種反應(yīng)性的 金屬手性 不對稱催化,巨大的障礙在于, 反應(yīng)過程中如何保留相對和絕對金屬中心的構(gòu)型。因為每個催化循環(huán)過程中金屬的配位數(shù)是變化的,因而金屬立體構(gòu)型多變(為金屬立體構(gòu)型提供了充足的搶奪機會) 。 希望拋磚引玉! |

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