Silver Triflate Catalyzed Acetylation of Alcohols, Thiols, Phenols, and Amines
作者:Debashis Chakraborty、Rima Das
DOI:10.1055/s-0030-1259999
日期:2011.5
variety of alcohols, thiols, phenols, and amines were subjected to acetylation reaction using acetic anhydride in the presence of catalytic quantity of silver triflate. The method described has a wide range of applications, proceeds under mild conditions, does not involve cumbersome workup, and the resulting products are obtained in high yields within a reasonable time. acetylation - silver triflate -
Pentacoordinate organosilicate as an alkylating reagent: Palladium catalyzed methylation of aryl halides
作者:Yasuo Hatanaka、Tamejiro Hiyama
DOI:10.1016/0040-4039(88)80026-1
日期:1988.1
Under the influence of palladiumcatalyst, tris(diethylamino)sulfoniumdifluorotrimethylsilicate is found to deliver the methyl group to aryl halides highly chemoselectively, and the corresponding methylated aromatic compounds are produced in moderate to high yields.
Flow Chemistry Syntheses of Styrenes, Unsymmetrical Stilbenes and Branched Aldehydes
作者:Samuel L. Bourne、Matthew O'Brien、Sivarajan Kasinathan、Peter Koos、Päivi Tolstoy、Dennis X. Hu、Roderick W. Bates、Benjamin Martin、Berthold Schenkel、Steven V. Ley
DOI:10.1002/cctc.201200778
日期:2013.1
Two tandem flowchemistry processes have been developed. A single palladium‐catalysed Heck reaction with ethylene gas provides an efficient synthesis for functionalised styrenes. Through further elaboration the catalyst becomes multi‐functional and performs a second Heck reaction providing a single continuous process for the synthesis of unsymmetrical stilbenes. In addition, the continuous, rhodium‐catalysed
We report a palladium-catalysed ethylene Heck reaction for the vinylation of aryl iodides using a tube-in-tube gas-liquid reactor. The flow process afforded various styrenes in short reaction times, employing moderate ethylene pressure.