作者:Guangjian Mei、Hao Yuan、Yueqing Gu、Wei Chen、Lung Wa Chung、Chuang-chuang Li
DOI:10.1002/anie.201406278
日期:2014.10.6
The first dearomative indole [5+2] cycloaddition reaction with an oxidopyrylium ylide resulted in efficient and diastereoselective construction of some highly functionalized and synthetically challenging oxacyclohepta[b]indoles. The protocol proceeds under very mild reaction conditions, thus enabling high functional‐group tolerance and unique endo selectivity.
Enantioselective Copper(II)/Box‐Catalyzed Synthesis of Chiral
<i>β</i>
<sup>3</sup>
‐Tryptophan Derivatives
作者:Elena A. Tarasenko、Ivan V. Shestakov、Victor B. Rybakov、Irina P. Beletskaya
DOI:10.1002/cctc.201900575
日期:2019.8.21
acids and their derivatives are important building blocks for the preparation of various bioactive compounds and materials. We developed a highly efficient method for the synthesis of β3‐tryptophan derivatives based on enantioselective Friedel‐Crafts alkylation of indoles with phthaloyl‐protected aminomethylenemalonate in the presence of chiral complex as a catalyst. A wide range of indoles with electron‐donating
An efficient hydrocyanation of α, β-unsaturated diesters with TMSCN catalyzed by MgI<sub>2</sub> etherate
作者:Haokun Pan、Hua Li、Huijun Liu、Xingxian Zhang
DOI:10.1080/10426507.2019.1700377
日期:2020.5.3
Abstract A mild, efficient and highly regioselective addition of trimethylsilyl cyanide (TMSCN) to α,β-unsaturated diesters has been achieved by using MgI2 etherate as catalystundersolvent-freeconditions. This protocol provides the corresponding β-cyano esters in high yields. Graphical Abstract
An anti‐Michael route for the synthesis of indole‐spiro (indene‐pyrrolidine) by 1,3‐cycloaddition of azomethineylide with indole‐derivatised olefins
作者:Shivaraj Yellappa
DOI:10.1002/jhet.3843
日期:2020.3
One‐pot three‐component reaction for indole‐spiro (indene‐pyrrolidine) highly strained molecules were synthesized with moderate yield by 1,3‐cycloaddition of unsymmetrical dipolarophiles, prepared from indol‐3‐yl and 1‐acetyl‐1H‐indol‐3‐yl derivative with azomethineylide generated through decarboxylative addition of amino acid sarcosine and ninhydrine, which is confirmed by NOESY. Our method is to
On the origin of nonexponential fluorescence decay in tryptophan and its derivatives
作者:J. W. Petrich、M. C. Chang、D. B. McDonald、G. R. Fleming
DOI:10.1021/ja00350a014
日期:1983.6
nonexponential fluorescence decay of tryptophan and its derivatives is discussed in terms of a simple model based on conformers about the Ca-CB bond and the relative rates of charge transfer from indole to various electrophiles. Accurate predictions concerning the relative fluorescence lifetimes and the form of the fluorescence decay law are made for tryptophan and 17 of its derivatives, including three