Regio- and Diastereoselective Organo-Zinc-Promoted Arylation of<i>trans</i>-2,3-Diaryloxiranes by Arylboronic Acids: Stereoselective Access to<i>trans</i>-2,3-Diphenyl-2,3-dihydrobenzofuran
作者:Teresa Laurita、Lucia Chiummiento、Maria Funicello、Rosarita D'Orsi、Deborah Sallemi、Daniela Tofani、Paolo Lupattelli
DOI:10.1002/ejoc.201900588
日期:2019.7.23
substituted trans 2,3‐diaryloxiranes were regio‐ and stereoselectively arylated by arylzinc reagents, obtained from the corresponding boronic acids by B–Zn exchange. The method allowed a direct and high yielding access to trans 2,3‐diphenyl 2,3‐dihydro benzofuran. The use of enantioenriched starting diaryl oxiranes resulted in no loss of stereochemical integrity in the final trans 2,3‐dihydrobenzofuran
通过芳基锌试剂将邻-羰基取代的反式2,3-二芳基吡喃酮进行区域和立体选择性芳基化,芳基锌试剂是通过B-Zn交换从相应的硼酸中获得的。该方法可以直接,高产率地获得反式2,3-二苯基2,3-二氢苯并呋喃。使用对映体富集的起始二芳基环氧乙烷在最终的反式2,3-二氢苯并呋喃中不会导致立体化学完整性的损失。