found to react exclusively at the 2-position of trifluoromethanesulfonate 2-alkyl(aryl) 1,3-oxazolinium salts 2. In most cases, the reaction leads specifically to a new series of 5-alkyl(aryl) 6-cyano 2,3-dihydro 1,4-oxazepine 7-ones 3. This efficient one-step ring-enlargement process occurs at the oxazolidine stage. Structural parameters affecting the scope and limitations of this condensation are discussed
发现乙基
氰基乙酸钠仅在
三氟甲磺酸盐2-烷基(芳基)1,3-
恶唑啉鎓盐2的2位上反应。在大多数情况下,反应会导致一系列新的5烷基(芳基)6-
氰基2,3-二氢1,4-氧杂氮杂7-酮3。这种有效的一步扩环过程发生在
恶唑烷阶段。讨论了影响这种冷凝作用范围和限制的结构参数。