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Cyclization of aldonic acid aroylhydrazides to 1,3,4-oxadiazoline derivatives

โœ Scribed by Mahmoud A.M. Nassr; Mamdouh A.M. Taha; Mohammed A.E. Shaban

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
329 KB
Volume
121
Category
Article
ISSN
0008-6215

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โœฆ Synopsis

D-Glucono-1,5-&tone reacts with aroylhydrazines to give the corresponding 1-aroyl-2-D-gluconylhydrazines. Condensative cyclization of these compounds using triethyl orthoformate gave the corresponding 5-aryl-2-ethoxy-3-D-gluconyl-2,3-dihydro-1,3,4_oxadiazoles. 'Sugar 1,3.4-Oxadiaaoles, Parf V. For Part IV, see ref. I. **To whom inquiries should be sent.

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Cyclization of 2,3,4,5-tetra-O-acetylgalactaric bis-(aroylhydrazides) to saccharide bis(1,3,4-oxadiazolyl) derivatives
โœ Mahmoud A.M. Nassr; Mamdouh A.M. Taha; Mohammed A.E. Shaban ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 478 KB

Condensation of 2,3,4,S-tetra-0-acetylgalactaroyl dichloride with two equivalents of various aroylhydrazines gave the corresponding 2.3,4,5-tetra-O-acetylgalactaric bis(aroylhydrazides). Condensative and dehydrativc cyclization of these bis(hydrazides) with triethyl orthoformate and phosphoryl chlor