Mild Procedure for Preparing Vinyldiazoacetic Acid Esters of Carbohydrate Acetonides

Title: Mild Procedure for Preparing Vinyldiazoacetic Acid Esters of Carbohydrate Acetonides

Volume: 3 Issue: 1

Author(s): Renata d. S. Rianelli, Fernando d. C. da Silva, Maria C. B. V. de Souza and Vitor F. Ferreira

Affiliation:

Keywords: Vinyldiazoacetic acid esters, α-diazo-β-hydroxy esters, carbohydrates

Abstract: We described, herein, the preparation of new vinyldiazoacetic acid esters of carbohydrate acetonides (5b-g) in good to moderate yields. The key step of this procedure is the elimination reaction performed with α- diazo-β-hydroxy esters 4a-h by using trifluoroacetic anhydride and triethylamine as reagents. This methodology has some advantages over that one described in the literature (POCl3) for the preparation of such kind of compounds. The use of trifluoroacetic anhydride, an easily available reagent, in mild reaction condition allows the preparation of the acid sensitive carbohydrate derivatives 5b-g without the detection of degradation products. The methodology can also be extended to the synthesis of other types of vinyldiazoacetic acid esters as it was shown for 5a and 5h.

Cite this article as:

Rianelli d. S. Renata, da Silva d. C. Fernando, de Souza C. B. V. Maria and Ferreira F. Vitor, Mild Procedure for Preparing Vinyldiazoacetic Acid Esters of Carbohydrate Acetonides, Letters in Organic Chemistry 2006; 3 (1) . https://dx.doi.org/10.2174/157017806774964459