作者:Chathuri J. Kombala、Dulamini I. Ekanayake、Dustin E. Gross
DOI:10.1016/j.tetlet.2017.08.052
日期:2017.9
The direct transesterification of dioxaborolanes (alkane-1,2-diol based boronate esters) was explored. Using BF3·OEt2, alkane-1,2-diol based mono- and bis-boronate esters (i.e., pinacol and ethylene glycol) have been converted quantitatively to either benzene-1,2-diol or alkane-1,3-diol based boronate esters. In the case of pinacol esters, esterification is facilitated by the accompanying pinacol rearrangement
探索了二氧杂硼烷(基于烷烃1,2-二醇的硼酸酯)的直接酯交换反应。使用BF 3 ·OEt 2,已将基于烷烃1,2-二醇的单硼酸酯和双硼酸酯(即频哪醇和乙二醇)定量转化为苯1,2-二醇或烷烃1,3-二醇基硼酸酯。在频哪醇酯的情况下,伴随的频哪醇重排促进酯化,从而改变反应平衡。