76017-15-7Relevant academic research and scientific papers
Radical C?N Borylation of Aromatic Amines Enabled by a Pyrylium Reagent
Chabbra, Sonia,Cornella, Josep,Leutzsch, Markus,Ma, Yuanhong,Niski, Jan,Pang, Yue,Reijerse, Edward J.,Schnegg, Alexander
, (2020/03/23)
Herein, we report a radical borylation of aromatic amines through a homolytic C(sp2)?N bond cleavage. This method capitalizes on a simple and mild activation via a pyrylium reagent (ScPyry-OTf) thus priming the amino group for reacti
Pyrylium Mediated Transformations of Neopentylamine
Katritzky, Alan R.,Singh, Jagadish N.
, p. 421 - 424 (2007/10/02)
A series of 2,4-diphenyl-5,6-dihydrobenzochromenylium salts have been prepared.They react with neopentylamine to form the corresponding 1-neopentylquinolinium salts which on thermolysis afford neopentyl halides, trifluoracetate, and thiocyanate, in good yields without rearrangements.
Trifluoromethanesulphonic Acid as Cyclodehydrating Agent: Synthesis of Nitrogen Heterocycles via 5,6-Dihydro-2,4-diphenylpyrylium Cation
Elshafie, Sayed Mahmoud M.
, p. 586 - 588 (2007/10/02)
N-Substituted 5,6-dihydro-2,4-diphenylnaphtho-pyridinium triflates (5a-q) have been prepared in high yields by the condensation of 5,6-dihydro-2,4-diphenylnaphthopyrylium triflate (4) with different amines.The pyrylium salt (4) in turn can b
Improved Methods for Conversion of Primary Amines into Bromides
Katritzky, Alan R.,Al-Omran, Fatima,Patel, Ranjan C.,Thind, Sukhpal S.
, p. 1890 - 1894 (2007/10/02)
N-Alkyl- and N-benzyl-4-p-chlorophenyl-2,3,5,6-tetraphenyl- N-alkyl- and N-benzyl-2,3,4,5,6-pentaphenyl-, and N-alkyl- and N-benzyl-2,4,6-triphenyl-pyridinium bromides on pyrolysis at 180-220 deg C give the corresponding alkyl and benzyl bromides in high yield. 1-Benzyl-5,6-dihydro-2,4-diphenylbenzoquinolinium trifluoromethanesulphonate gave benzyl bromide on heating with KBr in dimethylformamide at 100 deg C, and n-octyl bromide (80percent) was obtained from the corresponding pentacyclic bromide in refluxing acetonitrile.
The Preparation of 2,4,6-Triphenylpyrylium Trifluoromethanesulphonate, Fluorosulphonate, Ethoxysulphonate, Naphthalene-2-sulphonate, Stannochloride, Trichloroacetate, and Trifluoroacetate and other Pyrylium Trifluoromethanesulphonates and their Reactions
Katritzky, Alan R.,El-Mowafy, Azzahra M.,Marzorati, Liliana,Patel, Ranjan C.,Thind, Sukhpal S.
, p. 4001 - 4030 (2007/10/02)
The title pyrylium salts are all readily prepared in high yield from 1,3,5-triphenylpent-2-ene-1,5-dione.Amines react with the trifluoromethanesulphonate, naphthalene-2-sulphonate, and trifluoroacetate to give the corresponding pyridinium salts in high yi
