23165-53-9Relevant articles and documents
Organophosphine-free copper-catalyzed isothiocyanation of amines with sodium bromodifluoroacetate and sulfur
Feng, Wei,Zhang, Xing-Guo
supporting information, p. 1144 - 1147 (2019/01/28)
A copper-catalyzed isothiocyanation of amines with sodium bromodifluoroacetate and sulfur in the absence of organophosphine has been established. This approach represents a simple and efficient one-pot synthesis of isothiocyanates, and features excellent functional group tolerance and the use of a cheap, safe and odorless sulfur source. Moreover, this process could directly provide isothiocyanate analogous bioactive molecules, thiocarbonyl-containing pesticides and facile construction of benzoxazole and benzimidazole frames.
Isothiocyanate synthesized by three components and preparation method of isothiocyanate
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Paragraph 0036, (2019/04/26)
The invention discloses isothiocyanate and a preparation method thereof. The method comprises the steps that primary amine, sodium difluorobromoacetate and elemental sulfur are taken as reactants forreaction; the reaction is carried out under the action of a copper catalyst, wherein the copper catalyst is any one of cuprous chloride, copper bromide, cuprous iodide, copper chloride and copper trifluoromethanesulfonate; an alkali is also added, wherein the alkali is any one of sodium bicarbonate, potassium carbonate, cesium carbonate, potassium phosphate, DABCO and sodium tert-butoxide; the whole reaction is carried out in a solvent, wherein the solvent is acetonitrile or dimethyl sulfoxide, the reaction temperature is 80-120 DEG C, and the reaction time is 10-14 hours. The method can directly synthesize the target product, does not need to separate intermediate products and only needs stirring and heating reaction under normal pressure to obtain the target product, and the yield can beup to 87%; a waste solution is fewer during the reaction, and the method protects the environment and ensures the health of an operator; in addition, a series of isothiocyanate derivatives can be prepared, and the method has a stronger substrate universality.
Reaction of Thiocarbonyl Fluoride Generated from Difluorocarbene with Amines
Yu, Jiao,Lin, Jin-Hong,Xiao, Ji-Chang
supporting information, p. 16669 - 16673 (2017/12/07)
The reaction of thiocarbonyl fluoride, generated from difluorocarbene, with various amines under mild conditions is described. Secondary amines, primary amines, and o-phenylenediamines are converted to thiocarbamoyl fluorides, isothiocyanates, and difluoromethylthiolated heterocycles, respectively. Thiocarbamoyl fluorides were further transformed into trifluoromethylated amines by using a one-pot process. Thiocarbonyl fluoride is generated in situ and is rapidly fully converted in one pot under mild conditions; therefore, no special safety precautions are needed.
Synthesis of thiophene-2-carboxamidines containing 2-aminothiazoles and their biological evaluation as urokinase inhibitors
Wilson, Kenneth J.,Illig, Carl R.,Subasinghe, Nalin,Hoffman, James B.,Jonathan Rudolph,Soll, Richard,Molloy, Christopher J.,Bone, Roger,Green, David,Randall, Troy,Zhang, Marie,Lewandowski, Frank A.,Zhou, Zhao,Sharp, Celia,Maguire, Diane,Grasberger, Bruce,DesJarlais, Renee L.,Spurlino, John
, p. 915 - 918 (2007/10/03)
The serine protease urokinase (uPa) has been implicated in the progression of both breast and prostate cancer. Utilizing structure based design, the synthesis of a series of substituted 4-[2-amino-1,3-thiazolyl]-thiophene-2-carboxamidines is described. Further optimization of this series by substitution of the terminal amine yielded urokinase inhibitors with excellent activities.