Carbon-Based Leaving Group in Substitution Reactions: Functionalization of sp<sup>3</sup>-Hybridized Quaternary and Tertiary Benzylic Carbon Centers
作者:Stuart J. Mahoney、Tiantong Lou、Ganna Bondarenko、Eric Fillion
DOI:10.1021/ol301442z
日期:2012.7.6
Lewis acid promoted substitution reactions employing Meldrum’s acid and 5-methyl Meldrum’s acid as carbon-based leaving groups are described which transform unstrained quaternary and tertiary benzylic Csp3–Csp3 bonds into Csp3–X bonds (X = C, H, N). Importantly, this reaction has a broad scope in terms of both suitable substrates and nucleophiles with good to excellent yields obtained (typically >90%)
描述了路易斯酸促进的取代反应,该反应使用Meldrum酸和5-甲基Meldrum酸作为碳基离去基团,可将未应变的季铵和叔苄基C sp 3 –C sp 3键转变为C sp 3 –X键(X = C,H ,N)。重要的是,就合适的底物和亲核试剂而言,该反应具有广泛的范围,并具有良好至优异的产率(通常> 90%)。