89942-59-6Relevant articles and documents
Method for producing substituted pyridine-carboxylic acids
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Page column 4, (2008/06/13)
An improved process for the preparation of substituted pyridinecarboxylic acids (II), useful as herbicide intermediates, by ozonolysis of quinolines (I).
Compounds
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, (2008/06/13)
Substituted semicarbazones, thiosemicarbazones and isothiosemicarbazones and salts thereof, intermediates therefor, synthesis thereof, and the use of said compounds for the control of weeds.
REINVESTIGATION OF THE REACTION OF NICOTINIC ACID 1-OXIDE WITH ACETIC ANHYDRIDE
Nagano, Hiroyuki,Hamana, Masatomo,Nawata, Yoshiharu,Prachayasittikul, Supaluk,Abdel-Sayed, Ashraf N.,Bauer, Ludwig
, p. 1263 - 1270 (2007/10/02)
Reinvestigation of the reaction of nicotinic acid 1-oxide (1) with boiling acetic anhydride has revealed that the primary product is not 2-acetylnicotinic acid 1-oxide (3) but 3-acetoxy-4-aza-3-methyl-1(3H)-isobenzofuranone 4-oxide (2), the acetate of the ring tautomer of 3.Reactions of 2 and 3 with phosphorus trichloride and some related reactions are reported.