Reaction of 5-(Substituted-amino)oxazoles with N-Phenylmaleimide
Reaction of 5-aminooxazoles with N-phenylmaleimide gave 7-hydroxy-2-phenylpyrrolopyridine-1,3-diones and 7-amino-2-phenylpyrrolopyridine-1,3-diones via tricyclic adducts.The ratio of the 7-hydroxy compound and 7-amino compound depended on th
Shimada, Sadakatsu
p. 1237 - 1241
(2007/10/02)
A Convenient Synthesis of Pyridoxine
A novel and convenient synthesis of pyridoxine starting from N-(1-cyanoethyl)formamide is described.The reaction of N-(cyanoethyl)acylamides with olefins in the presence of an acid catalyst gave 3-amino-2-methylpyridines.Similar reaction of N-(1-cyanoethyl)formamide with fumaronitrile in the presence of trifluoroacetic acid afforded 5-amino-6-methylpyridine-3,4-dicarbonitrile, which was easily converted to pyridoxine by reduction and diazotization.Keywords - N-(1-cyanoethyl)acylamide; fumaronitrile; 3-amino-2-methylpyridine; 3-cyano-2-propen-1-yl acetate; pyridoxine
Shimada, Sadakatsu,Oki, Masaharu
p. 38 - 43
(2007/10/02)
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