Efficient C−C Double-Bond Formation Reaction via a New Synthetic Strategy: A Self-Sorting Tandem Reaction
作者:Guodong Yin、Baohan Zhou、Xianggao Meng、Anxin Wu、Yuanjiang Pan
DOI:10.1021/ol060541e
日期:2006.5.1
[reaction: see text] A novel and efficient carbon-carbon double-bond formationreaction via coupling of aryl or heteroaryl methyl ketones has been developed. A dimethyl sulfoxide-iodine-CuO system was proven to be efficient for this reaction and afforded the expected products in good yields. A new synthetic strategy, a self-sorting tandem reaction, was involved in this type of reaction and was presented
Diastereoselective sp3-C-H Functionalization of Arylmethyl Ketones and Transformation of <i>E</i>
- to <i>Z</i>
-Products Through Photocatalysis
作者:Gaurav K. Rastogi、Bhaskar Deka、Mohit L. Deb、Pranjal K. Baruah
DOI:10.1002/ejoc.201901415
日期:2020.1.31
route for 1,4‐enedione derivatives under microwave irradiation from the reaction of arylmethylketones with DMSO or diphenyl sulfoxide was developed. E‐isomers of the products can be transformed into Z‐isomers through visible light promoted photocatalysis.
Efficient Condensation between
Glyoxal Hydrates and Sulfonium Salts Leading to Highly
Functionalized 1,4-Diketones
作者:Chunbao Li、Qiyun Shao
DOI:10.1055/s-2008-1078267
日期:——
α-Alkylthio-substituted α,β-unsaturated 1,4-dicarbonyl compounds with three different functionalities are easily available through condensation of sulfonium salts and various aromatic or aliphatic glyoxal hydrates catalyzed by Na2SeO3 or a combination of selenium dioxide and Na2CO3.
Iodine-Catalyzed Synthesis of Alkylthio-Substituted 1,4-Enediones from Styrenes and Dialkyl Sulfoxides
作者:Mohit L. Deb、Pranjal K. Baruah、Gaurav K. Rastogi
DOI:10.1055/s-0041-1737494
日期:2022.10
We have developed an efficient iodine-catalyzed route for the synthesis of 2-(alkylthio)-substituted 1,4-enedione derivatives from styrenes under an open air atmosphere. Styrenes are heated with a range of sulfoxides in the presence of iodine and potassium persulfate to afford the desired products in high yields. Except for DMSO, all the sulfoxides are synthesized in the laboratory and are used crude
2-Methylthio-substituted 1,4-enediones, obtained from readily available aryl methyl ketones, were reacted with primary or secondary amines to afford the desired 1,4-diaryl-2-aminobut-2-ene-1,4-diones in excellent yields with high Z/E-stereoselectivity. (C) 2012 Elsevier Ltd. All rights reserved.