Citation: Zheng YAN, Wen Long HUANG, Wei Yi HUA, Si Xun PENG. Studies on the Reaction of Benzopyran-4-one with Hydroxylamine Hydrochloride[J]. Chinese Chemical Letters, ;1997, 8(2): 95-96. shu

Studies on the Reaction of Benzopyran-4-one with Hydroxylamine Hydrochloride

Department of Medicinal Chemistry, Chinese Pharmaceutical University, Nanjing 210009

Received Date: 21 October 1996

Fund Project: This work was financially supported by a grant of the National Natural Science Foundation of China.

It is reported that 6-methyl-flavanone oxime would rearrange to isoxazoline in the presence of trifluroacetic acid and the rearrangement would not take place in anhydrous ethanol with catalytic amount of pyridine.However,6-nitro-benzopyran-4-one when treated with hydroxylamine hydrochloride,gave oxime and its isomeric isoxazoline through rearrangement under acid or alkali condition.
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