Treatment of anhydro-4-hydroxy-l,3-oxazolium hydroxide (2; named isomunchnon) with ethylenic dipolarophiles gave 1,3-dipolar cycloadducts in high yields. Stereochemistry of these cycloadducts was confirmed by the investigation of nmr coupling constants.
用烯属偶极亲和物处理脱
水-
4-羟基-1,3-
恶唑鎓氢氧化物(2;命名为isomunchnon)以高产率得到1,3-偶极环加合物。这些环加合物的立体
化学通过核磁共振耦合常数的研究得到证实。