Adamantyl-BINOL as platform for chiral porous polymer aromatic frameworks. Multiple applications as recyclable catalysts
作者:Cristina Monterde、Rodrigo Navarro、Marta Iglesias、Félix Sánchez
DOI:10.1016/j.jcat.2019.07.059
日期:2019.9
diethylzinc to aromatic aldehydes (ee up to 88%). The corresponding heterogenized phosphoric acid (Ad-BINOL-PO2H-PAF) was applied as heterogeneous recyclable organocatalyst for the cascade condensation/amine addition of anthranilamide with aldehydes and transfer hydrogenation reactions obtaining high yields but low enantioselectivity. On the other hand, heterogeneous phosphoric acid (Ad-BINOLs-PO2H-PAF)
在本文中,我们报告了基于金刚烷基-BINOL的手性多孔芳香族聚合物(Ad-BINOL-PAFs)的合成,用于多相催化。Ad-BINOL-OH-PAF(365 m 2 ·g -1 SA BET)是通过4,4'-二溴-O-乙基保护的金刚烷基-BINOL与1,3,5-三苯苯-之间的共价键构建的4',4'',4'''-三硼酸并在[Ti(OiPr)4 ]存在下,可以有效地将二乙基锌不对称加成到芳族醛中(ee高达88%)。相应的杂化磷酸(Ad-BINOL-PO 2H-PAF)被用作多相可循环利用的有机催化剂,用于蒽酰胺与醛的级联缩合/胺加成反应和转移氢化反应,从而获得高收率但对映选择性低。另一方面,非均相磷酸(Ad-BINOLs-PO 2 H-PAF)也用作合成铑(II)配合物的有效磷酸盐配体,铑(II)配合物是苯乙烯环丙烷化的有效催化剂,可提供高收率和高收率的手性环丙烷非对映选择性(> 99%)和中等对映选择性(ee