Synthesen mitN-Trimethylsilylheteroarylium-Salzen: Umsetzungen mit Aldehyden, Ketonen und Carbonsäuren, Reaktivitätsvergleich mit analogenN-Acylheteroarylium-Salzen
ANDERS, ERNST;STANKOWIAK, ACHIM;RIEMER, ROLAND, SYNTHESIS,(1987) N 10, 931-934
作者:ANDERS, ERNST、STANKOWIAK, ACHIM、RIEMER, ROLAND
DOI:——
日期:——
Phosphinalkylene, 51<sup>1</sup>; Synthese und Reaktionen von [1-(Trialkylsilyl)alkyliden]triphenylphosphoranen
作者:Hans Jürgen Bestmann、Andreas Bomhard、Roman Dostalek、Rainer Pichl、Roland Riemer、Reiner Zimmermann
DOI:10.1055/s-1992-26227
日期:——
Synthesis and Reactions of [1-(Trialkylsilyl)alkylidene[triphenylphosphoranes Alkylidenetriphenylphosphoranes 1 react with trialkyl halosilanes 2 to afford silylated alkylidenephosphoranes 5, which can be converted to acylated alkylidenephosphoranes 8 and 10 by trimethylsilyl carboxylates 6 or carboxylic anhydrides 10. Bis(acylalkylidenephosphoranes) 13-15 are available from 5 and bis(trimethylsilyl) dicarboxylates 12 or cyclic or polymeric anhydrides 16, 17.
Synthesen mit<i>N</i>-Trimethylsilylheteroarylium-Salzen: Umsetzungen mit Aldehyden, Ketonen und Carbonsäuren, Reaktivitätsvergleich mit analogen<i>N</i>-Acylheteroarylium-Salzen
作者:Ernst Anders、Achim Stankowiak、Roland Riemer
DOI:10.1055/s-1987-28128
日期:——
Syntheses with N-Trimethylsilylheteroarylium Salts: Reactions with Aldehydes, Ketones and Carboxylic Acids. Comparison of Reactivity with Analoguous N-Acylheteroarylium Salts N-Trimethylsilylheterorylium salts 2 can he characterized as efficient silylating reagents for carbonyl compounds (5 or 8) and carbonic acids 11, their reactivity is comparable to that of N-acylheteroarylium salts 1. In some cases (depending on the nature of the substrates), their silylating power can be stronger than the acylating power of comparable salts 1. This will be demonstrated in the case of enolizable examples of 5and 8.