1500-94-3Relevant articles and documents
Reactions of nitrilium salts with indole and pyrrole and their derivatives in the synthesis of imines, ketones and secondary amines
Giles, Robert G.,Heaney, Harry,Plater, M. John
, p. 7367 - 7385 (2015/08/24)
Abstract Reactions of N-methyl- and N-ethyl-nitrilium salts with indole and pyrrole and their derivatives yield imines or imine salts in good yields. The related imines are obtained from the salts after careful basification and hydrolysis of the imine salts or the imines by heating with aqueous base give the related ketones in good yields. Alternatively, the imine salts can be reduced using sodium borohydride in methanol to give the related secondary amines.
Efficient synthesis of pyrroles and 4,5,6,7-tetrahydroindoles via palladium-catalyzed oxidation of hydroxy-enamines
Aoyagi, Yutaka,Mizusaki, Toshihiko,Shishikura, Masahiro,Komine, Takashi,Yoshinaga, Tokuji,Inaba, Haruko,Ohta, Akihiro,Takeya, Koichi
, p. 8533 - 8538 (2007/10/03)
Facile and one-pot synthetic route of poly-substituted pyrroles and 4-oxo-4,5,6,7-tetrahydroindoles is established, which consists of three steps: (1) palladium-catalyzed oxidation of hydroxy-enamines by using tetrakis(triphenylphosphine)palladium and mesityl bromide oxidation system, (2) intramolecular cyclization, and (3) dehydration.
Synthesis of substituted pyrroles in the glaser reaction
Vizer,Yerzhanov,Dembitsky
, p. 66 - 73 (2007/10/03)
The substituted pyrroles and dipyrroles along with diacetylenes and cumulenes have been synthesized in high yields using a new synthetic method under mild reaction conditions using the Glaser coupling reaction. Although diacetylenes are formed from 2-prop
First Reactions of Dialkoxycarbenium Tetrafluoroborates with Pyrroles, 5H-Dibenzazepines, and Electron-Rich Arenes
Pindur, U.,Flo, C.
, p. 1563 - 1568 (2007/10/02)
Pyrrole (2a) and 2,5-dimethylpyrrole (2b) react with the dialkoxycarbenium tetrafluoroborates 1a-1c under kinetic control to yield the corresponding acylpyrrole derivatives. 5H-Dibenzazepine (9a) and the 10,11-dihydro derivative 9b react only with the most elecrophilic of the series of electrophiles tested, namely, diethoxycarbenium tetrafluoroborate (1a), to furnish the corresponding formyl derivatives.Similarly, in arene chemistry, the highly electron-rich N,N-dimethylaniline (13a) and 1,3,5-trimethoxybenzene (13b) are formylated by reaction with 1a.
THE FORMATION OF ACYLAMINO-DERIVATIVES OF INDOLES AND PYRROLES BY REACTIONS WITH NITRILIUM SALTS
Eyley, Stephen C.,Giles, Robert G.,Heaney, Harry
, p. 4649 - 4652 (2007/10/02)
N-Methylnitrilum fluoroborates are prepared rapidly by warming trimethyloxonium fluoroborate wiht a slight excess of the nitrile, subsquent addition of indoles and pyrroles at low temperatures (-50 deg C to -20 deg C) gives iminium salts (and hence ketones) in high yields.