TiCl<sub>4</sub>-promoted desulfurization of thiocarbonyls and oxidation of sulfides in the presence of H<sub>2</sub>O<sub>2</sub>
作者:Kiumars Bahrami、Mohammad M. Khodaei、Vida Shakibaian、Donya Khaledian、Behrooz H. Yousefi
DOI:10.1080/17415993.2011.647915
日期:2012.4.1
TiCl4 proved to be a highly reactive reagent system for the desulfurization of thioamide and thioketone derivatives in excellent yields and short reaction times with high purity. Sulfides were also found to undergo oxidation to sulfones under similar reaction conditions. In most cases, these reactions are highly selective, simple, and clean, affording products in high yields and purity.
Trimethylsilyl Chloride Promoted Selective Desulfurization of Thiocarbonyls to Carbonyls with Hydrogen Peroxide
作者:Kiumars Bahrami、Mohammad Khodaei、Maryam Tajik
DOI:10.1055/s-0030-1258283
日期:2010.12
In the presence of hydrogen peroxide and trimethylsilyl chloride, thiocarbonyls desulfurize to the corresponding carbonyls. The safe, operationally simple, general reaction gives excellent yields in short reaction times with no side reactions and excellent regioselectivity, which makes this process an attractive, environmentally benign alternative for the desulfurization of thiocarbonyls. protecting
Willgerodt-Kindler reaction at room temperature: Synthesis of thioamides from aromatic aldehydes and cyclic secondary amines
作者:Arun D. Kale、Yogesh A. Tayade、Sachin D. Mahale、Rahul D. Patil、Dipak S. Dalal
DOI:10.1016/j.tet.2019.130575
日期:2019.10
out Willgerodt-Kindlerreaction of aromatic aldehydes at room temperature. At 120 °C, it is catalyst free reaction with lower reaction time whereas at room temperature, due to the additional amine molecule, Willgerodt-Kindlerreaction of aromatic aldehydes is successfully carried out at room temperature. On gram-scale, the reaction is successfully attempted under both conditions with good yields.
Condensation of Amines with S-Methyl Thiouronium Salts: Another Entry for the Synthesis of Amidines
作者:Toreshettahally R. Swaroop、Lokman Torun、Rahym Bakyyev、Kanchugarakoppal S. Rangappa
DOI:10.1055/a-2236-9522
日期:——
We present a condensation of primary aryl or alkyl amines with S-methyl thiouronium salts to obtain N,N,N′-trisubstituted amidines. High yields, short reaction times, and a fair substrate scope are the noteworthy features of this protocol. Surprisingly, the reaction of a thiouronium salt with 4-aminopyridine gave 1-(4-methoxybenzoyl)piperidine.
我们提出了伯芳基胺或烷基胺与S-甲基硫脲盐的缩合以获得N , N , N'-三取代脒。高产量、短反应时间和公平的底物范围是该协议的显着特点。令人惊奇的是,硫脲盐与4-氨基吡啶的反应得到1-(4-甲氧基苯甲酰基)哌啶。
H2O2/SOCl2: a useful reagent system for the conversion of thiocarbonyls to carbonyl compounds
作者:Kiumars Bahrami、Mohammad M. Khodaei、Azita Farrokhi
DOI:10.1016/j.tet.2009.06.110
日期:2009.9
The H2O2/SOCl2 reagent system has been used as a new and efficient reagent for deprotection of thiocarbonyls to carbonyl compounds. The salient features of this protocol are short reaction times, good chemoselectivity, clean reaction profiles, and simple work-up that preclude the use of toxic solvents. (C) 2009 Elsevier Ltd. All rights reserved.