ISSN:
1434-4475
Keywords:
Dimethyl-ethyl-3-(1-trifluoro-2-oxo)propylammonium-hydroxide
;
Trialkylammonium-di-trifluoroacetyl-methylide
;
Trialkylammonium-trifluoroacetyl-methylide
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The betaines1b–d were prepared4 by systematic variation of the alkyl groups and were reacted with trifluoroacetic acid anhydride (TFA) to give the diacyl-ylides2b,c. The betain1d andTFA afford the trifluoroacetate3d 5. The salts3b,c, which result from hydrolysis of2b,c as well as3d (X=I) can be transformed in 75 to 83% yield into the monoacyl-ylides4b–d with the help of silver oxide. Aqueous solutions of4a–d exhibit alkalinepH, which points to the formation of the corresponding ammonium bases. In the case of4b,c the bases5b,c could be isolated. It can be shown, that4b,c and5b,c, respectively, undergo a reversible addition or elimination of one mole wather with great ease.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00799936
