Cobalt(II)-Catalyzed Isocyanide Insertion Reaction with Sulfonyl Azides in Alcohols: Synthesis of Sulfonyl Isoureas
作者:Tian Jiang、Zheng-Yang Gu、Ling Yin、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.7b01127
日期:2017.8.4
A Co(II)-catalyzed isocyanide insertion reaction with sulfonyl azides in alcohols to form sulfonyl isoureas via nitrene intermediate has been developed. This protocol provides a new, environmentally friendly, and simple strategy for the synthesis of sulfonyl isoureaderivatives by employing a range of substrates under mild conditions.
Selective Oxidative Coupling Reaction of Isocyanides Using Peroxide as Switchable Alkylating and Alkoxylating Reagent
作者:Xinglu Zhang、Zhiqiang Liu、Yu Gao、Feng Li、Yaming Tian、Chunju Li、Xueshun Jia、Jian Li
DOI:10.1002/adsc.201700953
日期:2018.1.17
A switchable oxidativecoupling reaction of isocyanide and peroxide has been disclosed. In the presence of iron catalyst, the coupling reaction affords N‐arylacetamides in good yields. By simply replacing the iron with copper catalyst, another different coupling reaction takes place in which peroxide can serve as alkoxylating source. This protocol represents a new fundamental coupling of two basic
Phosphinic Acid/
<scp>NaI</scp>
Mediated Reductive Cyclization Approach for Accessing the
<scp>
<i>L</i>
‐1‐Deoxynojirimycin
</scp>
Using a
<scp>Two‐Component Three‐Centered</scp>
(
<scp>2C3C</scp>
) Ugi Type Reaction
作者:Chandra S Azad、Pratibha Shukla、Mark A Olson、Anudeep K Narula
DOI:10.1002/cjoc.202000634
日期:2021.6
A catalytic two-component three-centered (2C3C) Ugi-type reaction was developed for the synthesis of L-1-deoxynojirimycin (DNJ) isomers using a chiron approach. This new and quite mild catalytic system, comprised of phenylphosphinic acid/NaI, was used to synthesize both the L-allo-DNJ and L-altro-DNJ in high yield.
开发了一种催化两组分三中心(2C3C)Ugi型反应,用于使用Chiron方法合成L -1-脱氧野oji霉素(DNJ)异构体。这种由苯次膦酸/ NaI组成的新型且温和的催化体系用于高收率地合成L - allo -DNJ和L - altro -DNJ。
Cobalt(<scp>ii</scp>)-catalyzed bis-isocyanide insertion reactions with sulfonyl azides via nitrene radicals: chemoselective synthesis of sulfonylamidyl amide and 3-imine indole derivatives
作者:Zheng-Yang Gu、Jing-Hao Li、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1039/c7cc06531k
日期:——
chemoselective Co(II)-catalyzed effective synthesis of sulfonylamidyl amide and 3-imine indole derivatives by using isocyanides and sulfonylazides has been developed. This protocol provides a new, environmentally friendly and simple strategy for the efficient synthesis of the sulfonylamidyl amide and 3-imine indole derivatives with a wide range of substrates in the absence of any oxidants and additives.
TEMPO-Catalyzed Aerobic Oxidative Selenium Insertion Reaction: Synthesis of 3-Selenylindole Derivatives by Multicomponent Reaction of Isocyanides, Selenium Powder, Amines, and Indoles under Transition-Metal-Free Conditions
作者:Huan Liu、Yi Fang、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.orglett.7b03783
日期:2018.2.16
A novel and efficient approach for the selenium functionalization of indoles was developed with selenium powder as the selenium source, catalyzed by 2,2,6,6-tetramethylpiperidinooxy (TEMPO) and employing O2 as the green oxidant. This protocol provides a practical route for the synthesis of 3-selenylindole derivatives and has the advantages of readily available starting materials, mild reaction conditions