84202-24-4Relevant academic research and scientific papers
Reactivity of Imines Towards 3-Trifloxypropeniminium and Propyniminium Triflates
Rahm, Rainer,Maas, Gerhard
, p. 1295 - 1304 (2007/10/02)
The imines 5 and 11 react with 3-trifloxypropeniminium triflates 1a-d to afford the heterocyclic iminium salts 8, 9, 13, 15, and 17, respectively, or the propeniminium salt 21.Propyniminium triflates 22, 24 react with imines by initial conjugated addition
Nucleophilic Displacements of N-Aryl and Heteroaryl Groups. Part 1. Pyrylium-mediated Transformation of Anilines into Phenols
Katritzky, Alan R.,Langthorne, Ronald T.,Muathin, Hussni A.,Patel, Ranjian C.
, p. 2601 - 2604 (2007/10/02)
Aromatic amines with 2,4-diphenyl-5,6,7,8-tetrahydrochromenylium trifluoromethanesulphonate (5) gave the corresponding pyridinium salts (6; R = aryl) which were converted by base into the anhydrobases (7).Benzoyl chloride converted (7) into the new pyridinium anhydrobases (9).These anhydrobases (9) rearrangement at 150 deg C into the isomeric phenol enol ethers (10) which were readily hydrolysed to yield the corresponding phenols.The mechanistic and synthetic significance of the results are assessed.
THERMAL REARRANGEMENT OF PYRIDINIUM ANHYDROBASES: MIGRATION OF N-SUBSTITUENTS TO METHINE CARBON
Katritzky, Alan R.,Awartani, Radi
, p. 2505 - 2512 (2007/10/02)
N-Benzyl and N-methyl groups migrate to the methine carbon atom on thermolysis of pyridinium anhydrobases.Cross-over experiments indicate an intermolecular reaction, probably involving homolysis.
