It has been shown that N-(3-oxoalkyl)chloroacetamides (1) can be converted into cis-3,4-epoxypiridin-2-ones (2) upon treatment with t-BuOK in a t-BuOH-C6H6 solution due to a resulting intramolecular Darzens reaction. It has been found that under kinetically controlled reaction conditions (NaOH/C6H6), besides the intramolecular Darzens reaction an intramolecular alkylation takes place.
研究表明,在 t-BuOH-
C6H6 溶液中用 t-BuOK 处理后,N-(3-氧代烷基)
氯乙酰胺 (1) 可转化为顺式-3,4-环氧
吡啶-2-酮 (2),原因如下:由此产生的分子内 Darzens 反应。已经发现,在动力学控制的反应条件(NaOH/ )下,除了分子内Darzens反应之外,还发生分子内烷基化。