Diphenyl-4-(5-R-2-furyl)pyrylium and 2,4-diphenyl-6-(5-bromo-2-furyl)pyrylium perchlorates and the corresponding pyridines and l-methylpyridinium perchlorates were synthesized. On the basis of the UV and PMR spectra it was concluded that there is significant electronic interaction of the furylium s
Lanthanibe-induced shifts of pyridines, pyridinium and pyrylium salts
โ Scribed by Alexandru T. Balaban
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- French
- Weight
- 154 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Pyrylium Salts of ฮณ-Thiapyrones -A Simple Step to Phosphonophosphino Substituted Pyridines and Pyridinium Salts. -The recently reported pyrones (I) are easily converted to pyrylium salts (III). These [cf. (IIIa)] are converted to pyridines or pyridinium salts with ammonia or primary amines.
ClO 4 -N + Me(Ph) R Az Me(Ph) R 1 ClO 4 -R 1 = Me, Bu, iPr, Bn, Ph, tBu 4-Azulen-1-yl substituted 2,6-dimethyl-and 2,6-diphenyl-pyridinium salts are obtained in yields between 50 % and 100 % in the reaction of corresponding 4-azulen-1-yl-pyranylim salts and various amines. The effects of amine stru
in ethanol 1) +AzH in CH 3 NO 2 2) AcONH 4 (a) (b) 4-Azulen-1-yl substituted 2,6-dimethyl-and 2,6-diphenyl-pyridines are obtained in good yields from the reaction of corresponding 4-azulen-1-yl-pyranylium salts and ammonium acetate in ethanol or starting from 4-chloro-2,6-diphenyl-pyranylium salts