Synthetic studies on indole alkaloids. II. Applications of phenylsulfonylindoles on intramolecular cyclizations
作者:Mario Rubiralta、Anna Diez、Cristina Vila
DOI:10.1016/s0040-4039(00)89061-9
日期:1990.1
The synthesis of indolo[2,3-a]quinolizidin-2-one 15 is reported through the potassium tert-butoxide cyclization of N-hydroxyethyl-2-[1-(phenylsulfonyl)-3-indolyl]-4-piperidone ethylene acetal (5) into 3-spiroindolenine intermediate 6. Anhydrous acid treatment of 6 leads to the rearranged 2,3-indole substituted compound 14. The reactivity of intermediate 6 will be further applied to construct ring C
通过N-羟乙基-2- [1-(苯基磺酰基)-3-吲哚基] -4-哌啶酮乙烯缩醛的叔丁醇钾环化反应,报道了吲哚[2,3 - a ]喹啉基-2-酮15的合成。(5)成3-螺吲哚中间体6。6的无水酸处理导致2,3-吲哚取代的化合物14重排。的中间反应6将进一步施加到构造的环C马钱子和白坚木属框架。