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211.
The one‐pot, four‐component reaction of aryl aldehydes, aryl ketones, phosphorus trichloride, and acetonitrile, catalyzed by acetyl chloride, affords β‐acetamido ketones in good to excellent yields. Silicaphosphine (silphos), [P(Cl)3‐n(SiO2)n], can also be used effectively as a solid‐supported reagent instead of phosphorus trichloride. 相似文献
212.
A practical & cheaper reagent system ZrCl4/NaBH4 is used for the reductive cleavage of organic disulfides to mercaptans under mild conditions, in excellent yields. 相似文献
213.
Mathesan Jayagobi 《合成通讯》2013,43(19):2917-2930
Synthesis of a series of 1aR,2S,4aS-hexahydropyrrolo[3,4-b]quinolines has been achieved by the intramolecular cyclization reaction of aldimines derived from aromatic amines and (S)-2-(N-(3-methylbut-2-enyl)-N-tosyamino)-3-methylpropanal/(S)-2-(N-(3-methylbut-2-enyl)-N-tosyamino)-3-phenylpropanal in acetonitrile with InCl3 as a catalyst, in excellent yields and in short duration of time, under mild conditions. 相似文献
214.
A simple and efficient method has been developed for the one‐pot synthesis of α‐amino phosphonates from the reaction of a carbonyl compound, amine, and dialkyl phosphite. The highly catalytic nature of bismuth(III) chloride and the fact that it is relatively nontoxic, low cost, easy to handle, and insensitive to small amounts of air and moisture make this method especially attractive for large‐scale synthesis. 相似文献
215.
Synthesis of novel bis-(3-methyl-5-nitro-2-oxo-2,3-dihydro-2λ 5benzo[1,3,2]oxazaphosphol-2yl)substituted aryl methanes was accomplished by Pudovik reaction. Addition of equimolar quantities of 2-methylamino-4-nitro phenol (1) and ethanol to PCl3 afforded cyclic condensation product. On reaction with respective aldehydes followed by treatment with phosphorus(III) monochloride of 1, and on subsequent reaction at reflux temperature, this rearranged from P(III) to P(V) state. Their structures were determined by IR, 1H NMR, 13C NMR, 31P NMR, and mass spectral data. 相似文献
216.
A new method for preparation of N-tosylimines by InCl3-mediated condensation of aldehydes with p-toluenesulfonamide in refluxing benzene is reported.The procedure is lauded by its simplicity,mild reaction conditions,excellent yields and adaptability to electron deficient and electron rich aromatic,andα,β-unsaturated aldehydes. 相似文献