On the scope of the Pt-catalyzed Srebnik diborylation of diazoalkanes. An efficient approach to chiral tertiary boronic esters and alcohols via B-stabilized carbanions
作者:Andrew J. Wommack、Jason S. Kingsbury
DOI:10.1016/j.tetlet.2014.03.135
日期:2014.5
Conditions milder than those previously reported are shown to be generally applicable to the Pt-catalyzed insertion of non-carbonyl-stabilized diazoalkanes into B(2)pin(2). Selective transformation of one (pinacolato)boryl unit in the products is enabled by rapid, low-temperature deboronation in the presence of a Lewis base and genesis of a highly reactive B-stabilized carbanion. (C) 2014 Published by Elsevier Ltd.