Reactivity, Chemoselectivity, and Diastereoselectivity of the Oxyfunctionalization of Chiral Allylic Alcohols and Derivatives in Microemulsions: Comparison of the Chemical Oxidation by the Hydrogen Peroxide/Sodium Molybdate System with the Photooxygenation
作者:Véronique Nardello、Laurent Caron、Jean-Marie Aubry、Sabine Bouttemy、Thomas Wirth、R. Saha-Möller Chantu、Waldemar Adam
DOI:10.1021/ja048589f
日期:2004.9.1
The chiral allylic alcohols 1a-d and their acetate (1e) and silyl ether (1f) derivatives have been oxidized by the H2O2/MoO4(2)- system, a convenient and efficient chemical source of singlet oxygen. This chemical peroxidation (formation of the allylic hydroperoxides 2) has been conducted in various media, which include aqueous solutions, organic solvents, and microemulsions. The reactivity, chemoselectivity
手性烯丙醇 1a-d 及其乙酸酯 (1e) 和甲硅烷基醚 (1f) 衍生物已被 H2O2/MoO4(2)- 系统氧化,这是一种方便有效的单线态氧化学来源。这种化学过氧化(烯丙基氢过氧化物 2 的形成)已在各种介质中进行,包括水溶液、有机溶剂和微乳液。将这种化学氧化的反应性、化学选择性和非对映选择性与敏化光氧化的反应性、化学选择性和非对映选择性进行了比较,重点是在微乳液介质中的制备应用。虽然对于两种过氧化模式观察到相似的苏式非对映选择性,但化学选择性显着不同,因为在 H2O2/MoO4(2)- 系统的化学氧化中,中间过钼酸盐的不良环氧化与原位生成的单线态氧的理想过氧化有效竞争。A proper choice of the type of microemulsion and the reaction conditions furnishes a high chemoselectivity (up