Triphenylphosphine promoted addition of dimethyl acetylenedicarboxylate to 1,2-benzoquinones: facile synthesis of novel γ-spirolactones
作者:Vijay Nair、J. Somarajan Nair、A. U. Vinod、Nigam P. Rath
DOI:10.1039/a706272i
日期:——
The addition of dimethyl acetylenedicarboxylate to o-quinones in the presence of triphenylphosphine leading to highly functionalised γ-spirolactones is reported.
据报道,在三苯基膦存在下,邻醌与乙炔二甲酸二甲酯加成,可生成高官能度的δ³-巯基内酯。
Triphenylphosphane-Mediated Addition of Dimethyl Acetylenedicarboxylate to 1,2- and 1,4-Benzoquinones: Synthesis of Novel γ-Spirolactones
作者:Vijay Nair、J. Somarajan Nair、A. U. Vinod
DOI:10.1055/s-2000-8212
日期:——
The zwitterionic intermediate, generated by the addition of triphenylphosphane to dimethyl acetylenedicarboxylate, undergoes facile addition to ortho- and para-quinones to afford highly functionalized novel unsaturated γ-spirolactones in moderate to high yields.