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Nitrogen-oxygen and oxygen-oxygen alkyl group migrations. synthesis of 1,2,4-triazine hydroxamic acid esters

✍ Scribed by Misa V. Jovanovic

Book ID
104233513
Publisher
Elsevier Science
Year
1984
Tongue
French
Weight
230 KB
Volume
25
Category
Article
ISSN
0040-4039

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✦ Synopsis

____; Novel 1,2,4-triazine hydroxamic acid esters and alkylated 2,3-dihydro-1, 2,4triazine N-oxides were prepared by rearrangement and selective alkylations of 3-alkoxy and 3-alkylamino-1, 2,4-triazine N-oxides. In light of the current interests and the extensive research on pyrimidine bases, we want to report a facile alkylation of Γ³-azapyrimidine N-oxides (1, 2,4-triazines). It is well known that amino and alkoxypyridine, 2, and pyridazine N-oxides, 2, undergo rearrange-

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## Abstract A series of 6‐azacytosines **4a‐4k** and **5a‐5c** were prepared by nucleophilic cleavage of furan ring of [1]benzofuro[2,3‐__e__][1,2,4]triazine derivative **1**. Some of them were used for the preparation of derivatives of [1,2,4]triazolo[4,3‐__d__][1,2,4]triazine (**6a‐6d**) and tetr