以前未开发的将格利雅(Grignard)添加到羟吲哚中的方法通过一锅芳构化驱动的脱水途径,以高收率提供了一种区域特异性的方法,用于2-和2,3-二取代的吲哚衍生物。这种方法可以方便地制备用作烯丙基[1,2- a ]吲哚和咔唑的正交合成的闭环复分解(RCM)前体的二烯丙基吲哚。该方法的合成效用通过微管蛋白抑制剂和天然存在的咔唑生物碱的合成来说明。
Three-component spiropyran synthesis via tandem alkylation-condensation
作者:Harriet Swinson、Alexis Perry
DOI:10.1016/j.tet.2020.131219
日期:2020.6
A catalyst-free, three-component alkylation-condensation cascade for spiropyran synthesis has been developed, using readily available building blocks (indoles, alkyl halides, salicylaldehydes) and environmentally benign solvents (water, ethanol). A cascade approach enables this sequence to proceed under mild conditions which, in turn, promote broad substrate tolerance and operational simplicity. Consequently
Palladium-catalyzed selective <i>N</i>-allylation of indoles assisted by PEG–water system
作者:Bai-Jing Peng、Yi-Ting Huang、Ferenc Fülöp、I-Ling Lin、Shyh-Chyun Yang
DOI:10.1039/c9nj02335f
日期:——
The synthesis of N-allylic indoles is of great interest because of their potential biological properties.
N-烯丙基吲哚的合成具有很大的研究意义,因为它们具有潜在的生物学性质。
Platinum-catalyzed selective <i>N</i>-allylation of 2,3-disubstituted indoles with allylic acetates in water
作者:Bai-Jing Peng、Wen-Ting Hsueh、Ferenc Fülöp、Shyh-Chyun Yang
DOI:10.1039/c8nj05051a
日期:——
Due to their biological activity, indoles and substituted indoles have attracted considerable attention from both synthetic and medicinal scientists. Much effort has been directed toward the development of methods for the functionalization of the indole nucleus. The protocol uses a catalytic amount of catalyzed platinum as a promoting agent, producing N-allylated indoles in considerable yields. Moreover
Platinum-Catalyzed Allylation of 2,3-Disubstituted Indoles with Allylic Acetates
作者:Bai-Jing Peng、Wen-Ting Wu、Shyh-Chyun Yang
DOI:10.3390/molecules22122097
日期:——
allyation of nucleophiles was an established and efficient way, which has been applied to medicinal and organic chemistry. In our research, the platinum-catalyzed 2,3-disubstitued indoles with allylicacetates was investigated under different conditions. Herein, we established a simple, convenient, and efficient method, which afforded high yield of allylated indoles.
intermolecular self-[3+3] and cross-[3+3] cycloaddition pathways. Multiple symmetric and nonsymmetric polycyclic hexahydrocarbazole scaffolds with hexacyclic 6/5/5/6/5/5/6 and pentacyclic 6/5/5/6/5/6 ring systems are synthesized with high efficiency and chemoselectivity using this strategy. Inspired by the unique radicaladdition pathway of cross-[3+3] cycloaddition, a highly controllable benzylic C–H functionalization