Polymer-Supported Bisacetoxybromate(I) Anion –-An Efficient Co-Oxidant in the TEMPO-Mediated Oxidation of Primary and Secondary Alcohols
作者:Marco Brünjes、Georgia Sourkouni-Argirusi、Andreas Kirschning
DOI:10.1002/adsc.200202208
日期:2003.5
A polymer-bound reagent for the efficient oxidation of primary alcohols to aldehydes and secondary alcohols to ketones in the presence of a catalytic amount of 2,2,6,6-tetramethyl-1-piperidinyloxyl (TEMPO) is described. The oxidation process is particular mild and allows one to prepare aldehydes with α-chirality without racemization. This also includes the synthesis of α-aminoaldehydes. In most cases
描述了在催化量的2,2,6,6-四甲基-1-哌啶基氧基(TEMPO)存在下有效地将伯醇氧化成醛基并将仲醇氧化成酮的聚合物结合试剂。氧化过程特别温和,可以使人们制备具有α-手性的醛,而不会发生外消旋作用。这也包括α-氨基醛的合成。在大多数情况下,这种无重金属氧化的后处理是通过简单的过滤,然后除去溶剂实现的。在负载于阴离子交换树脂上的次氯酸盐阴离子存在下,由TEMPO介导的苯甲醛氧化可了解溴酸根(I)阴离子在氧化过程中的作用。