銠金屬 (I) / 掌性雙烯配體催化芳香硼酸與α-二酮之不對稱1,2-加成反應

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2015

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本論文探討利用一價銠金屬以及本實驗室所開發的掌性雙環[2.2.1]雙烯配基41B所形成的錯合物,在甲苯溶劑中,並以水當共溶劑,1,4-二氮雜二環[2.2.2]辛烷(DABCO)當作鹼,於60 °C下,催化一系列芳香硼酸2與α-二酮1進行不對稱1,2-加成反應。在3 mol%的銠金屬和掌性雙烯配體41B形成之催化劑反應下,建構出含掌性四級α-羥基酮化合物的加成產物3,得到3%到90%的產率,以及20%到77%的鏡像超越值。
Using 3 mol% of the chiral bicyclo[2.2.1]heptadiene ligand in the Rh(I)-catalyzed enantioselective 1,2-addition of a variety of arylboronic acids 2 to α-diketones 1, with DABCO as the base in the toluene‐water binary solvent system at 60 °C. Afforded the corresponding adducts, α-hydroxyketones 3 bearing a quaternary carbon stereogenic center in 3 – 90% yield and 20 – 77% ee.

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1, 2-加成反應, 1, 2-addition

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