Regioselective Oxygenations of <i>S</i>-<i>Trans</i> Dienes, Silyl Dienol Ethers (SDEs), by Triphenyl Phosphite Ozonide (TPPO) and Its Mechanistic Study
作者:Atsushi Mori、Manabu Abe、Masatomo Nojima
DOI:10.1021/jo015562v
日期:2001.5.1
The direct oxygenation of s-trans dienes, silyl dienol ethers (SDEs) 2, by triphenyl phosphite ozonide (TPPO) has been examined in detail. The regioselective oxygenation was found to give hydroperoxide 3, alcohol 4, ketone 5, dimer 6, and peroxy phosphate 7 with concomitant formation of triphenyl phosphate 8 and diphenyl trimethylsilyl phosphate 10. The formation of peroxy phosphate 7 was found for
已详细研究了亚磷酸三苯酯(TPPO)对s-反式二烯,甲硅烷基二烯醚(SDEs)2的直接氧化。发现区域选择性氧化产生氢过氧化物3,醇4,酮5,二聚体6和过氧磷酸盐7,同时形成磷酸三苯酯8和二苯基三甲基甲硅烷基磷酸酯10。在TPPO中首次发现过氧磷酸酯7的形成。氧化反应。低温(31)P和(1)H NMR光谱分析证明SDE与TPPO的直接反应而不会产生单线态氧。通过两性离子ZI的干预可以合理地解释含氧产物3-7的形成,该两性离子ZI可以通过SDE对臭氧化物的中心氧的亲核攻击而形成。