作者:R.R. Schmidt、R. Hirsenkorn
DOI:10.1016/s0040-4020(01)91922-2
日期:1983.1
butenolides, tetronates, cyclopentenones and derivatives, which are portions of many natural products. A wide variety of α- and β-substituents are compatible with this lithiation: alkyl-, aryl- and electron donating substituents in α-position or for instance an electron withdrawing ester group in β-position. Lithiation of aminomethylene malonitrile derivative 17 led to a new azafulvene 18.
β-官能取代的丙烯酸酯的直接C锂化可生成用于合成丁烯酸酯,四价酸酯,环戊烯酮和衍生物的通用构建单元,而丁烯酸酯,四价酸酯,环戊烯酮和衍生物是许多天然产物的一部分。各种各样的α-和β-取代基与这种锂化相容:α-位置上的烷基,芳基和给电子取代基,或例如β位置上的吸电子酯基。氨基亚甲基丙二腈衍生物17的锂化反应产生了新的氮杂富烯18。