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ChemInform Abstract: Preparation of Acetylated 1-Fluoroglycopyranosyl Cyanides.

✍ Scribed by V. GYOLLAI; L. SOMSAK; Z. GYOERGYDEAK

Book ID
101876038
Publisher
John Wiley and Sons
Year
2010
Weight
33 KB
Volume
30
Category
Article
ISSN
0931-7597

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✦ Synopsis

Preparation of Acetylated 1-Fluoroglycopyranosyl Cyanides.

-Reaction of 1-chloro-or 1-bromoglycopyranosyl cyanides (I), (V), and (VI) with silver fluoride or silver tetrafluoroborate represents a convenient method for the synthesis of 1-fluoroglycopyranosyl cyanides. It is shown that reaction with silver fluoride proceeds by S N 2 substitution with electrophilic assistance of silver ions by inversion of the configuration at the anomeric carbon. In contrast, reaction with silver tetrafluoroborate proceeds with retention of the anomeric configuration.

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ChemInform Abstract: Iodine as Acetylati
ChemInform Abstract: Iodine as Acetylation Catalyst in the Preparation of 1,1-Diacetates from Aldehydes.
✍ N. DEKA; D. J. KALITA; R. BORAH; J. C. SARMA 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 27 KB 👁 2 views

Iodine as Acetylation Catalyst in the Preparation of 1,1-Diacetates from Aldehydes. -The title reaction proceeds for a variety of aldehydes with shorter reaction times and higher yields as with usually applied catalysts and represents a general method for the synthesis of acylals (III) or diacylals