Synthesis of (pyridinyl)-1,2,4-triazolo[4,3-<i>a</i>]pyridines
作者:Daniel B. Moran、George O. Morton、J. Donald Albright
DOI:10.1002/jhet.5570230422
日期:1986.7
4-triazolo[4,3-a]pyridines were developed. The principal route to the required intermediate 2-chloropyridines was based on rearrangements of mono N-oxides of 2,2′-bipyridine, 2,3′-bipyridine, 3,3′-bipyridine, 2,4′-bipyridine and 4,4′-bipyridine with phosphorus oxychloride. Reaction of 3,3′-bipyridine 1-oxide or 2,2′-bipyridine 1-oxide with phosphorus oxychloride gave mixtures of chloro isomers. Reaction with acetic
Mild, General, and Regioselective Synthesis of 2-Aminopyridines from Pyridine N-Oxides via N-(2-Pyridyl)pyridinium Salts
作者:Hui Xiong、Adam T. Hoye
DOI:10.1055/s-0040-1719865
日期:2022.3
2-aminopyridines frompyridine N-oxides via their corresponding N-(2-pyridyl)pyridinium salts has been demonstrated and investigated. The reaction sequence features a highly regioselective conversion of the N-oxide into its pyridinium salt followed by hydrolytic decomposition of the pyridinium moiety to furnish the 2-aminopyridine product. The method is compatible with a wide range of functional groups, is
Studies on Organometallic Compounds. IX. Synthesis of Bipyride N-Oxides and Terpyridines by Palladium Catalyzed Cross-Coupling Reaction of Trimethylstannylpyridines with Bromopyridines
Reaction of trimethylstannylpyridines with bromopyridines in the presence of Pd(PPh(3))(4) directed toward a practical use was accomplished, giving all nine pyridinylpyridine N-oxides in satisfactory yields. Similarly, nicotelline and 2,2':6',2 ''-terpyridine were produced in good yields.
Réduction régiospécifique des bipyridines
作者:Jean-Christophe Plaquevent、Ilhame Chichaoui
DOI:10.1016/s0040-4039(00)73975-x
日期:1993.8
A method for the specific reduction of bipyridines through the use of the N - oxo derivatives is described.
KURBATOV YU. V.; TSUKERVANIK V. S.; ABDULLAEV SH. V., FIZ.-XIM. ISSLED. SINTETICH. I PRIROD. SOEDIN. SAMARKAND, 1980, 58-63
作者:KURBATOV YU. V.、 TSUKERVANIK V. S.、 ABDULLAEV SH. V.