PRACTICAL PROCEDURE FOR THE PREPARATION OF FUNCTIONALIZED (<i>E</i>)-1-ALKENYLBORONIC ACIDS INCLUDING THE UNPRECEDENTED 1-ALKOXYCARBONYL DERIVATIVES
作者:Michel Gravel、Barry B. Touré、Dennis G. Hall
DOI:10.1080/00304940409355974
日期:2004.12
the corresponding terminal alkynes. However, the most common methods used for this purpose suffer from chemoand regioselectivity problems. For example, catecholborane? which constitutes the reagent of choice to effect these transformations, does not tolerate aced or ether functionalities at the propargylic Moreover, hydrolysis of the boronate following catecholboration yields an equimolar amount of