Straightforward Functionalization of Sulfur-Containing Peptides via 5- and 6-endo-dig Cyclization Reactions
作者:Pavel Arsenyan、Sindija Lapcinska
DOI:10.1055/a-1343-5607
日期:2021.5
peptides containing S–S or S–H bonds by employing N-chlorosuccinimide. The corresponding sulfenyl electrophiles are further utilized in 5- and 6-endo-dig cyclization reactions yielding indolizinium salts, indoles, benzo[b]furans, polyaromatic hydrocarbons (PAHs) and isocoumarins, as well as quinolinones bearing a glutathione moiety. PAH derivatives can be used as selective fluorescent dyes for the
A simple and straightforward approach was developed to construct 5H‐benzo[b]carbazole derivatives by iron catalysis in a cascade sequence. The notable features of this work include an atom‐economical cascade sequence, unprecedented 1,4‐sulfonylmigration, tolerance of a variety of functional groups, good yields, and an economical catalytic system.
开发了一种简单而直接的方法,通过铁催化以级联顺序构建5 H-苯并[ b ]咔唑衍生物。这项工作的显着特征包括原子经济级联序列,前所未有的1,4-磺酰基迁移,对各种官能团的耐受性,良好的收率和经济的催化体系。
A concise approach for the synthesis of 3-iodoindoles and 3-iodobenzo[b]furans via Ph3P-catalyzed iodocyclization
作者:Yin-Long Li、Jian Li、Sheng-Nan Yu、Ji-Bo Wang、Yan-Min Yu、Jun Deng
DOI:10.1016/j.tet.2015.09.005
日期:2015.10
A variety of 3-iodoindole and 3-iodobenzo[b]furan derivatives were conveniently prepared from the corresponding 2-alkynylanilines and 2-alkynylphenols through Ph3P-catalyzed iodocyclization in the presence of N-iodosuccinimide (NIS). This protocol provides a rapid access to 3-iodoindoles and 3-iodobenzo[b]furans in good to excellent yields under mild conditions.
Selenocystine Peptides Performance in 5-<i>endo-dig</i>
Reactions
作者:Sindija Lapcinska、Pavel Arsenyan
DOI:10.1002/ejoc.201901548
日期:2020.2.21
Copper(II) bromide and oxidant promoted 5‐endo‐dig and 5‐endo‐dig/6‐endo‐dig cascade reactions are presented. Substituted benzo[b]furans, indoles, and indeno[1,2‐c]chromenes bearing Sec‐peptides in position 3 were prepared. This procedure can be successfully applied for protected and unprotected peptides obtained in up to quantitative yields.
介绍了溴化铜(II)和氧化剂促进的5-内挖和5-内挖/ 6-内挖级联反应。制备了在3位带有二肽的取代的苯并[ b ]呋喃,吲哚和茚并[1,2- c ]色烯。该方法可成功应用于以定量收率获得的受保护和不受保护的肽。
An aerobic copper-mediated domino process for the synthesis of 3-(trifluoromethylseleno)indoles
An aerobic copper-mediateddominoreaction for the synthesis of 3-(trifluoromethylseleno)indoles by trifluoromethylselenolation of N-Ts 2-alkynylaniline with [(bpy)CuSeCF3]2 is reported. This reaction proceeds through sequential oxidation, alkyne coordination, and deprotonation followed by reductive elimination. This mild and robust method is highly functional group tolerant and provides straightforward