Total synthesis of (±) aspidostomide B, C, regioisomeric N-methyl aspidostomide D and their derivatives
作者:Mulla Althafh Hussain、Faiz Ahmed Khan
DOI:10.1016/j.tetlet.2019.151040
日期:2019.9
A full account of the total synthesis of aspidostomide B, C, their analogues and our synthetic efforts towards the synthesis of aspidostomide D, which led to the synthesis of regioisomeric N-methyl aspidostomide D, its analoguesvia epoxide opening strategy is presented. The synthesis of regioisomeric N-methyl aspidostomide D involves an efficient, five-step sequence, with 36.3% overall yield, starting
Indolesynthesis by a gold(I)‐catalyzed intermolecular formal [4+2] reactionbetween 1,3‐diynes and pyrroles has been developed. This reaction involves the hydroarylation of 1,3‐diynes with pyrroles followed by an intramolecular hydroarylation to give the 4,7‐disubstituted indoles. This reaction can also be applied to the synthesis of carbazoles when indoles are used as the nucleophiles instead of
versatile 1,4-diketones are smoothly generated under metal-free and external-reductant-free electrolytic conditions. Moreover, the tolerance of various functional groups and decagram-scale experiments have shown the practicability and potential applications of this methodology. Moreover, a range of heterocyclic compounds were easily prepared through follow-up procedures of 1,4-diketones.
已经报道了在未分割的电池中有效氢化不饱和 C C 键的简单电化学方案。在无金属和无外部还原剂的电解条件下顺利生成一系列多功能的1,4-二酮。此外,各种官能团的耐受性和十克规模的实验表明了该方法的实用性和潜在应用。此外,通过1,4-二酮的后续程序可以轻松制备一系列杂环化合物。