2.1]hepta-2,5-dienes (la, lb) are excellent electron donors because of effective G-Tr conjugation between the orbitals of C-C lr bonds and Si-C ~ bonds. Some of their donor properties are demonstrated by the reactions with some electron acceptors. When la and lb are mixed with tetracyanoethylene, f
The reaction of 1,1,2,2-ethenetetracarbonitrile (TCNE) with aminopyridines: Salts and charge transfer complex formation
✍ Scribed by Paolo Bruni; Giorgio Tosi; Liberato Cardellini; Elisabetta Giorgini; Pierluigi Stipa
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 430 KB
- Volume
- 45
- Category
- Article
- ISSN
- 1386-1425
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📜 SIMILAR VOLUMES
## Abstract Treatment of 2‐__tert__‐butyl‐1‐benzoselenopyrylium salts **1A** and 2‐phenyl‐1‐benzoselenopyrylium salts **1B** with an alkyl(phenyl)magnesium halide resulted in nucleophilic addition at the C‐4 position to give the corresponding 2,4‐disubstituted 4__H__‐selenochromenes **2A** and **2B
The reaction of tri-and tetrasubstituted pyrylium salts with hydroxylamine affords acyclic keto-ketoximes (to be described in a separate paper) which cyclize yielding pyridine-l-oxides and/or 2-isoxazolines. Both these classes of compounds, with many possible applications, can thus be obtained simpl