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Dérivés de sucres à groupement gem-dihalogénoéthényle

✍ Scribed by Jean M. J. Tronchet; Alain-P. Bonenfant

Book ID
102858505
Publisher
John Wiley and Sons
Year
1980
Tongue
German
Weight
738 KB
Volume
63
Category
Article
ISSN
0018-019X

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✦ Synopsis

Carbohydrate Derivatives Bearing a gem‐Dihalogenoethenyl Group

Treated with the appropriate Wittig reagent, aldehydosugar derivatives (1–13) led in good to excellent yields to the expected gem‐difluoro, gem‐chlorofluoro‐and/or gem‐dichloroenoses (14–29). Examples of their dibromo analogues had been previously described (see e.g. [1]) but the diiodo derivatives could not be isolated, The influence of the conditions on the yields is reported as well as spectroscopic properties (particularly the long‐range ^13^C, ^19^F‐ and ^1^H, ^19^F‐coupling constants) of these new enoses.

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