Stereocontrolled Synthesis of Contiguous C(sp<sup>3</sup>)−C(aryl) Bonds by Lanthanide(III)-Catalyzed Domino Aryl-Claisen [3,3]-Sigmatropic Rearrangements
作者:Timothy R. Ramadhar、Jun-ichi Kawakami、Alan J. Lough、Robert A. Batey
DOI:10.1021/ol1018147
日期:2010.10.15
A domino [3,3]-sigmatropic aryl-Claisen rearrangement of cyclic and acyclic bisaryloxy-substituted alkenes can be performed in high yield by using Ln(fod)3 catalysis to obtain bisphenolic products incorporating two contiguous aryl−C(sp3) bonds. Stereospecific rearrangement was observed for cyclic substrates. The precursor diaryl ethers were typically synthesized from the corresponding diols by double
环状和无环双芳基氧基取代的烯烃的多米诺[3,3]-σ芳基-克莱森重排可通过使用Ln(fod)3催化以高收率进行,以获得包含两个相邻芳基-C(sp 3)键的双酚类产物。观察到环状底物的立体特异性重排。该前体的二芳基醚被典型地从相应的二醇通过使用铜催化aryltrifluoroborate盐或用S耦合双芳基化的方法合成Ñ的Ar反应。