A series of 3-alkenyl-4-oxo-6,7-dihydro-4H-pyrano[3,4-d]isoxazole derivatives was prepared by reaction of hydroxylamine with 4,5-dioxo-2,3,7,8-tetrahydro-4H,5H-pyrano[4,3-b]pyran derivatives.

中文翻译：

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某些3-烯基-4-氧代-6,7-二氢-4 H-吡喃并[3,4- d ]异恶唑的合成

通过羟胺与4,5-二氧代-2,3,7,8的反应制备了一系列3-烯基-4-氧代-6,7-二氢-4 H-吡喃并[3,4- d ]异恶唑衍生物-四氢-4 H，5 H-吡喃并[4,3- b ]吡喃衍生物。