Asymmetric Alkyldifluoroboranes and Their Use in Secondary Amine Synthesis
作者:Donald S. Matteson、Gyung Youn Kim
DOI:10.1021/ol025973d
日期:2002.6.1
[reaction: see text] Asymmetric diol boronic esters with potassium bifluoride form the corresponding alkyltrifluoroborate and free diol under mild conditions. Defluoridation with tetrachlorosilane produces an alkyldifluoroborane intermediate. This conversion of relatively unreactive boronic esters to derivatives that are strong Lewis acids opens new synthetic opportunities, as illustrated by the preparation