16585-31-2Relevant articles and documents
Scandium(III) Triflate Catalyzed Direct Synthesis of N-Unprotected Ketimines
Hirazawa, Yoshinobu,Kadota, Tetsuya,Kondo, Yuta,Morimoto, Hiroyuki,Morisaki, Kazuhiro,Ohshima, Takashi
, p. 120 - 125 (2020)
N-Unprotected ketimines are useful substrates and intermediates for synthesizing valuable nitrogen-containing compounds, but their potential applicability is limited by the available synthetic methods. To address this issue, we report a scandium(III) triflate catalyzed direct synthesis of N-unprotected ketimines. Using commercially available reagents and Lewis acid catalysts, ketones were directly transformed into the corresponding N-unprotected ketimines in high yields with broad functional group tolerance, even in multigram scales. The reactions were readily applicable for one-pot synthesis of important compounds such as a glycine Schiff base without isolation of N-unprotected ketimine intermediates. Preliminary mechanistic studies to clarify the reaction mechanism are also described.
Synthetic procedure to pyrido[2,1-f][1,2,4]triazinium salt and related compounds
Bátori, Sándor,Csányi, Dorottya,Takács, Daniella,Egyed, Orsolya,Riedl, Zsuzsanna,Hajós, Gy?rgy
, p. 180 - 185 (2018/12/11)
N-aminopyridyl ketone salts were reacted with formamide to yield heteroaromatic pyrido[2,1-f][1,2,4]triazinium salts. Upon storage of these products in the presence of water, formation of covalent hydrates have been observed. Reaction of the same starting compound with urethane yielded 3-chloropyrido[2,1-f][1,2,4]triazinium salt which readily reacted with secondary amines to afford 3-amino derivatives. An analogous ring closure reaction of 2-formylaminomethyl- and formaminobenzylpyridine allowed the synthesis of the partially reduced 3,4-dihydropyrido[2,1-f][1,2,4]triazinium compounds. The cyclization procedure was also applied for the synthesis of the related pyrimido[2,1-f][1,2,4]triazinium salt.
Synthesis of homo- and heterobiarylmethylamines
Terrasson, Vincent,Marque, Sylvain,Scarpacci, Annabelle,Prim, Damien
, p. 1858 - 1862 (2008/01/27)
A variety of homo- and heterobiarylmethylamines were prepared in modest to high yields via a convenient one-pot process. Georg Thieme Verlag Stuttgart.
Synthesis and Reduction of 2,2-diaryl-1-nitroethylenes by using a chiral and a non chiral NADH model in the pyrrolopyridine series
Levacher, Vincent,Valque, Claude,Coupa, Sophie,Dupas, Georges,Queguiner, Guy,Bourguignon, Jean
, p. 1211 - 1215 (2007/10/03)
Reduction of 2,2-diphenyl-1-nitroethylene (1) and 2-(2-pyridyl)-2-phenyl-1-nitroethylene (5) is achieved by using the NADH model in the pyrrolopyridine series 2a to give 2,2-diphenyl-1-nitroethane (3) and 2-(2-pyridyl)-2-phenyl-1-nitroethane (7) respectively in 40% yield. The asymmetric reduction of 2-(2-pyridyl)-2-phenyl-1-nitroethylene by the chiral NADH model 2b is studied. Thus, 2-(2-pyridyl)-2-phenyl-1-nitroethane (7) is obtained in 15 to 32% yield. The stereocontrol of the reduction proved to be dependent on the amount of magnesium ions.