Heterocycles p. 1263 - 1270 (1987)
Update date:2022-08-29
Topics:
Nagano, Hiroyuki
Hamana, Masatomo
Nawata, Yoshiharu
Prachayasittikul, Supaluk
Abdel-Sayed, Ashraf N.
Bauer, Ludwig
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.
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