Synthesis and structure of 3,7-dihydro-2h-1,2,4-triazolo-[1′,5′-a′]tripyrimido[4,5-d]benzo[bpyrans
✍ Scribed by S. M. Desenko; V. D. Orlov; N. V. Getmanskii; S. A. Komykhov; B. V. Paponov; A. Yu. Kovalevskii; O. V. Shishkin; Yu. T. Struchkov
- Publisher
- Springer US
- Year
- 1996
- Tongue
- English
- Weight
- 458 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0009-3122
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The title compound, C 12 H 14 N 6 , was synthesized via cyclocondensation of 5-amino-1-guanyl-3-phenyl-1,2,4-triazole with acetone. Only one tautomeric form with an H atom at the triazine N atom was observed in the crystal structure. The compound crystallizes with two almost identical molecules in t
## Abstract The aza‐Wittig reactions of benzaldehyde‐, acetophenone‐ and benzophenone 1‐[(triphenylphosphor‐anylidene)amino]ethylidenehydrazones (**1**) with 2,3‐furandiones **6** provide a new route to 4__H__,8__H__‐1,2,4‐triazolo[1,5‐__c__][1,3]oxazepin‐4‐ones **14** or 5,6‐dihydro‐7__H__,12__H__
The reaction of 3-mercapto-4-aryIideneamino-l,2,4triazoles 2b-d, 3a-d with ethyl bromoacetate and/or phenacyl bromide in hot DMF and triethylamine affords the stereochemically pure 7-acyl-6-aryl-6,7dihydro-5H-lt2, 4-triazolo[3,4-b][l, 3,4]thiadiazines