Regioselective Synthesis of 4-Acetyl-and 5-Acetyl-3-methylisoxazole: Their Conversion into Silyl-and Methyl Enol Ethers
作者:Stefano Chimichi、Barbara Cosimelli
DOI:10.1080/00397919208021114
日期:1992.11
(E)-4-methoxy-3-buten-2-one to give 5-acetyl-2 and 4-acetyl-3-methylisoxazole 3, respectively. Treatment of ketones 2 and 3 with trimethylsilyl trifluoromethanesulfonate gave the silyl enol ethers 4 and 5, whereas the methyl enol ethers 8 and 9 were obtained via elimination of methanol from the corresponding dimethyl ketals.
摘要 乙腈氧化物与 3-丁烯-2-酮和 (E)-4-甲氧基-3-丁烯-2-酮发生区域选择性反应,分别生成 5-乙酰-2 和 4-乙酰-3-甲基异恶唑 3。用三甲基甲硅烷基三氟甲磺酸酯处理酮 2 和 3 得到甲硅烷基烯醇醚 4 和 5,而甲基烯醇醚 8 和 9 是通过从相应的二甲基缩酮中消除甲醇获得的。