69705-29-9Relevant articles and documents
C?N Axial Chiral Hypervalent Iodine Reagents: Catalytic Stereoselective α-Oxytosylation of Ketones
Alharbi, Haifa,Elsherbini, Mohamed,Qurban, Jihan,Wirth, Thomas
supporting information, p. 4317 - 4321 (2021/02/16)
A simple synthesis of a library of novel C?N axially chiral iodoarenes is achieved in a three-step synthesis from commercially available aniline derivatives. C?N axial chiral iodine reagents are rarely investigated in the hypervalent iodine arena. The potential of the novel chiral iodoarenes as organocatalysts for stereoselective oxidative transformations is assessed using the well explored, but challenging stereoselective α-oxytosylation of ketones. All investigated reagents catalyse the stereoselective oxidation of propiophenone to the corresponding chiral α-oxytosylated products with good stereochemical control. Using the optimised reaction conditions a wide range of products was obtained in generally good to excellent yields and with good enantioselectivities.
Revisiting the Gold-Catalyzed Dimerization of 2-Ethynylanilines: A Room-Temperature and Silver-Free Protocol for the Synthesis of Multifunctional Quinolines
Praveen, Chandrasekar,Perumal
, p. 855 - 864 (2016/03/15)
A room temperature and silver-free protocol for the formation of quinolines from 2-ethynylanilines through a dimerization event was achieved using a dinuclear gold catalyst, Au2(BIPHEP)(NTf2)2. The reaction is inherently modular, allowing for the incorporation of peripheral substituents at any site of the quinoline product. The reaction is readily applied to other heterocyles also as exemplified by the preparation of naphthyridines. Competition reactions to determine the reactivity of dissimilar alkynes demonstrated that the product ratio of dimerization vs intermolecular addition is rather dependent on the electronic nature of aryl substituent on the alkynes. However, control experiments with substrates possessing internal alkynes resulted in cycloisomerization instead of expected dimerization, which is indicative of possible steric influence of the alkyne terminus in the reaction outcome.
QUINAZOLINEDIONE DERIVATIVE
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Paragraph 1460; 1461, (2015/03/16)
The present invention relates to quinazolinedione derivatives represented by formula (I) or pharmaceutically acceptable salts thereof.