- A new application of rhodanine as a green sulfur transferring agent for a clean functional group interconversion of amide to thioamide using reusable MCM-41 mesoporous silica
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A novel thionation protocol for amide compounds, with the system rhodanine/secondary amine has been discovered. Clean and efficient synthesis of a variety of thioamides can be achieved through this simple and convenient method using MCM-41 mesoporous silica as an acid catalyst. For this purpose we have synthesized MCM-41 silica and characterized by using an array of sophisticated analytical techniques like BET, HR TEM, EDX, XRD, 29Si MAS NMR and FTIR. This reaction is therefore a very neat example of a functional group interconversion.
- Ray, Suman,Bhaumik, Asim,Dutta, Arghya,Butcher, Ray J.,Mukhopadhyay, Chhanda
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p. 2164 - 2170
(2013/05/08)
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- Reactions of N,N-Disubstituted 5-arylmethylidene-2-aminothiazol-4(5H)-ones with CH acids
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N,N-Disubstituted 5-arylmethylidene-2-aminothiazol-4(5H)-ones reacted with diethyl malonate, ethyl benzoylacetate, acetylacetone, or cyclopentadiene in refluxing toluene and in presence of powdered sodium to give the respective 5-arylmethylidene-2′-amino-
- Kandeel, Kamal A.,Youssef, Ali M.,EI-Bestawy, Hany M.,Omar, Mohamed T.
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p. 1211 - 1219
(2007/10/03)
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- 2-Dialkylamino-thiazolin-4-ones from α-Thiocyanato-carboxylic Acid Derivatives
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α-Thiocyanato-acetic acid esters 1 a-c or amide 1 d react with dialkylamine salts of weak acids to give 2-dialkylamino-thiazolin-4-ones 2 a-f.The reaction can be performed using aliphatic alcohols, dipolar aprotic solvents or halogenated hydrocarbons as reaction medium or by heating the educts at 90 deg C without any solvent.According to the latter method, the 5-substituted thiazolinones 2 g, h are obtained from α-thiocyanatopropionic acid ethyl ester (1 d) or α-thiocyanato-phenylacetic acid ethyl ester (1 e) and dimethylamine actetate. - I.r., u.v. and n.m.r. data of the thiazolinones 2 are reported.
- Zimmermann, T.,Fischer, G. W.,Olk, B.
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p. 540 - 546
(2007/10/02)
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