✦ LIBER ✦

Cyclization of 2,3,4,5-tetra-O-acetylgalactaric bis-(aroylhydrazides) to saccharide bis(1,3,4-oxadiazolyl) derivatives

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

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 478 KB
Volume: 121
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(83)84012-9

No coin nor oath required. For personal study only.

✦ Synopsis

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 chloride, respectively, gave the corresponding 3,3'-(2,3.4,5-tetra-O-acetylgalactar-1,6-dioyl)-bis(5-aryl-2-cthoxy-2,3-dihydro-1,3,4-oxadiazole) and 1,2,3.4-tctra-O-acetyl-1.4-bis(%aryl-1,3,4-oxadiazol-Z-yl)-gala&o-tetritols. The elucidation of the structure of the compounds prepared is discussed and mechanistic pathways for their formation are proposed.

📜 SIMILAR VOLUMES

Selective cyclisation of 2, 3, 4, 5-tetr

Selective cyclisation of 2, 3, 4, 5-tetra-O-acetyl-galactaric acid bis-[Alkylthio(thiocarbonyl)]hydrazide to Saccharide 1, 3, 4-Oxadiazole, Thiadiazole, and thiadiazoline derivatives

✍ El-Sayed M. E. Mansour; Ahmed A. Kassem; Tarek M. Abass; Ahmed A. El-Toukhy; M. 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 323 KB

Synthesis of 3,3′-Bi-1,2,4-triazolo[4,5-

Synthesis of 3,3′-Bi-1,2,4-triazolo[4,5-a]benzimidazole, 5,5′-Bi-1,3,4-thiadiazole, and Thiazolo[3,2-a]benzimidazole Derivatives.

✍ Kamal M. Dawood; Mohamed A. Raslan; Ahmad M. Farag 📂 Article 📅 2004 🏛 John Wiley and Sons ⚖ 138 KB 👁 1 views

## Abstract For Abstract see ChemInform Abstract in Full Text.

Bis[1,3-dimethyl-3,4,5,6-tetrahydropyr

Bis[1,3-dimethyl-3,4,5,6-tetrahydropyrimidin-2(1H)-one-κO]diiodocadmium(II)

✍ Lundberg, Daniel ;Eriksson, Lars 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 223 KB

Single-crystal X-ray study T = 100 K Mean (C-C) = 0.012 A R factor = 0.043 wR factor = 0.107 Data-to-parameter ratio = 29.3 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

2-Nitroguanidine Derivatives. Part 5. Sy

2-Nitroguanidine Derivatives. Part 5. Synthesis and Structure of 3,5-Bis(nitroamino)-1,2,4-triazole Salts. Acid—Base Properties of 3,5-Bis(nitroamino)-1,2,4-triazole.

✍ E. L. Metelkina 📂 Article 📅 2004 🏛 John Wiley and Sons ⚖ 13 KB 👁 2 views

Synthesis and Crystal Chemistry of Two N

Synthesis and Crystal Chemistry of Two New Fluorite-Related Bismuth Phosphates, Bi4.25(PO4)2O3.375 and Bi5(PO4)2O4.5, in the Series Bi4+x(PO4)2O3+3x/2 (0.175 ≤ x ≤ 1).

✍ B. Muktha; T. N. Guru Row 📂 Article 📅 2006 🏛 John Wiley and Sons ⚖ 10 KB 👁 2 views

Synthesis and antinociceptive activity o

Synthesis and antinociceptive activity of 4,4′-bis(1-substituted-semicarbazidyl)diphenylmethane and 4,4′-bis(5-substituted-2,4-dihydro-3-oxo-3H-1,2,4-triazol-4-yl)diphenylmethane derivatives

✍ Monika Pitucha; Anna Chodkowska; Mariusz Maciejewski; Ewa Jagiello-Wójtowicz; An 📂 Article 📅 2010 🏛 Springer Vienna 🌐 English ⚖ 220 KB