efficient method for the synthesis of N-1,1-dimethyl-2-propenyl (reverse prenyl) indole was developed by the N-propargylation of the indoline, partial hydrogenation of the terminal alkyne, and oxidation to the indole using chemical manganesedioxide (CMD). This method was used for the synthesis of the antifungal indole alkaloids 2, 3, and N-reverse prenylated tryptophan.
Intermolecular Hydroamination of 1,3-Dienes To Generate Homoallylic Amines
作者:Xiao-Hui Yang、Alexander Lu、Vy M. Dong
DOI:10.1021/jacs.7b09188
日期:2017.10.11
We report a Rh-catalyzed hydroamination of 1,3-dienes to generate homoallylic amines. Our work showcases the first case of anti-Markovnikov selectivity in the intermolecular coupling of amines and 1,3-dienes. By tuning the ligand properties and Brønsted acid additive, we find that a combination of rac-BINAP and mandelic acid is critical for achieving anti-Markovnikov selectivity.
Palladium-Catalyzed Synthesis of <i>N</i>-<i>tert</i>-Prenylindoles
作者:Kirsten F. Johnson、Ryan Van Zeeland、Levi M. Stanley
DOI:10.1021/ol4011344
日期:2013.6.7
Palladium-catalyzed N-tert-prenylations of indoles, tricarbonylchromium-activated indoles, and indolines that occur In high yields (up to 94%) with high tert-prenyl-to-n-prenyl selectivity (up to 12:1) are reported.
A stereoselective synthetic approach to (2S,3R)-N-(1′,1′-dimethyl-2′,3′-epoxypropyl)-3-hydroxytryptophan, a component of cyclomarin A
作者:Darren B. Hansen、Alan S. Lewis、Steven J. Gavalas、Madeleine M. Joullié
DOI:10.1016/j.tetasy.2005.10.040
日期:2006.1
A stereoselective synthetic approach to (2S,3R)-N-(1',1'-dimethyl-2',3'-epoxypropyl)-3-hydroxytryptophan an amino acid contained in cyclomarin A was accomplished. The synthesis is based on a diastereoselective addition of an indole Grignard into a chiral serine aldehyde equivalent. (c) 2005 Elsevier Ltd. All rights reserved.
Practical Synthesis of 7-Prenylindole
作者:Xin Xiong、Michael C. Pirrung
DOI:10.1021/jo070734v
日期:2007.7.1
7-Prenylindole is a useful building block for natural product and natural product analogue synthesis. While there have been several past syntheses of 7-prenylindole, none of them is very practical for its preparation on scale. Using an aza-Claisen rearrangement as the key step, 7-prenylindole has been prepared in four steps from indoline in 62% overall yield.