Abstract Synthesis of a series of novel spiro[3,4-diaryl-4,5-dihydroisoxazole-5,31-flavan-41-one] has been accomplished in good yields by the regioselective 1,3-dipolar cycloaddition reaction of nitrile oxide to 3-arylmethylidene flavan-4-ones.
摘要 通过氧化腈的区域选择性 1,3-偶极环加成反应,合成了一系列新型螺[3,4-二芳基-4,5-二氢
异恶唑-5,31-flavan-41-one]。到 3-芳基亚
甲基黄烷-4-酮。