A model for olefin hydration: intramolecular nucleophilic addition of phenolate oxygen to the unactivated double bond
作者:Christopher M. Evans、Anthony J. Kirby
DOI:10.1039/p29840001259
日期:——
Two series of phenol–olefins with strained ground states cyclise rapidly to ethers at high pH, where the phenol is fully ionised. The reaction involves intramolecular nucleophilic addition of phenolate oxygen to a monoalkylethylene. A primary carbanion is not a full intermediate, but is well developed before proton transfer from a pre-associated water molecule or cationic general acid completes the
在高pH下,两个具有应变基态的酚-烯烃系列迅速环化成醚,其中苯酚被完全离子化。该反应涉及将酚盐的氧分子内亲核加成到单烷基乙烯中。初级碳负离子不是完整的中间体,但在从预缔合的水分子或阳离子通用酸转移质子以完成反应之前就已经很好地发展了。证据表明,在酶活性位点中占优势的特殊条件很可能主要是对大多数烯烃的亲核攻击,而不是通常的亲电子攻击。