2,4-Dimethyl-3-phenylisoxazole anhydrobases were easily prepared from the corresponding 5-chloroisoxazolium trifluoromethanesulfonate and carbon anions of 1,3-dioxo compounds in the presence of triethylamine. Photorearrangement of 2-(2,4-dimethyl-3-phenyl-2H-isoxazol-5-ylidene)malonic acid diethyl ester gave a 4,5-dihydrofuroazetidinone in good yield.
在
三乙胺存在下,由相应的5-
氯异恶唑三
氟甲烷磺酸盐和1,3-二氧杂化合物的碳阴离子可轻松制备2,4-二甲基-
3-苯基异恶唑脱
水碱。2-(2,4-二甲基-3-苯基-2的Photorearrangement ħ -
异恶唑-5-亚基)
丙二酸二乙酯,得到收率良好4,5- dihydrofuroazetidinone。