One-pot facile conversion of Baylis–Hillman adduct into N-alkyl 3-(E)-alkylidene-5-substituted sulfonylpiperidine-2,6-dione. Formal synthesis of tacamonine
作者:Chung-Yi Chen、Meng-Yang Chang、Ru-Ting Hsu、Shui-Tein Chen、Nein-Chen Chang
DOI:10.1016/j.tetlet.2003.08.053
日期:2003.11
stepwise [3+3] strategy to N-alkyl 3-(E)-alkylidene-5-substituted sulfonylpiperidine-2,6-dione 1 used various N-alkyl α-substituted sulfonylacetamides 2 and α,β-unsaturated esters 3 as starting materials. α,β-Unsaturated esters 3 were generated by Baylis–Hillman reaction. A ring closure mechanism was proposed for the reactions. This method provides a convenient formal synthesis of tacamonine.
N-烷基3-(E)-亚烷基-5-取代的磺酰基哌啶-2,6-二酮1的逐步[3 + 3]策略使用各种N-烷基α-取代的磺酰基乙酰胺2和α,β-不饱和酯3作为起始材料。α,β-不饱和酯3是通过Baylis-Hillman反应生成的。提出了反应的闭环机理。该方法提供了塔卡莫宁的方便的形式合成。