Hydrogenation of β-Keto Sulfones to β-Hydroxy Sulfones with Alkyl Aluminum Compounds: Structure of Intermediate Hydroalumination Products
作者:Michał Kotecki、Zbigniew Ochal、Paweł Socha、Vadim Szejko、Łukasz Dobrzycki、Mariola Stypik、Wanda Ziemkowska
DOI:10.3390/molecules27072357
日期:——
reactions of β-keto sulfones with aluminum trialkyls, hydroalumination products with β-hydroxy sulfone ligands [R2AlOC(C6H5)CH2S(O)2(p-R1C6H4]n [where n = 1,2; 2aa: R = i-Bu, R1 = CH3; 2ab: R = i-Bu, R1 = Cl; 2ba: R = Et, R1 = CH3; 2bb: R = Et, R1 = Cl] and [Et2AlOC(C6H5)CH2S(O)2(p-ClC6H4]∙Et3Al}n 3bb were obtained. These complexes in the solid state have a dimeric structure, while in solutions, they
β-羟基砜在有机合成中很重要。β-羟基砜合成最简单的方法是β-酮基砜的氢化。在此,我们报道了烷基铝化合物 R 3 Al (R = Et, i -Bu, n -Bu , t -Bu和n -Hex ) 的还原性能;i -Bu 2 AlH; Et 2 AlCl 和 EtAlCl 2在 β-酮砜加氢中的作用。化合物i -Bu 2 AlH、i -Bu 3 Al 和 Et 3Al是β-酮基砜至β-羟基砜的最佳还原剂。在 β-酮砜与三烷基铝的反应中,氢铝化产物与 β-羟基砜配体 [R 2 AlOC(C 6 H 5 )CH 2 S(O) 2 ( p -R 1 C 6 H 4 ] n [其中n = 1,2;2aa:R = i -Bu,R 1 = CH 3;2ab:R = i -Bu,R 1 = Cl;2ba:R = Et,R 1 = CH 3; 2bb : R = Et, R 1 = Cl] 和 [Et 2