Asymmetric peroxidation of prochiral allylic and benzylic compounds with tert-butyl hydroperoxide and chiral bisoxazoline–copper complexes
作者:Manfred Schulz、Ralph Kluge、Feyissa Gadissa Gelalcha
DOI:10.1016/s0957-4166(98)00435-2
日期:1998.12
oxidant is reported. Cyclohexene 1, cyclopentene 5, α-angelica lactone 7, allylbenzene 9 and 2-phenylbutane 11 were converted into the optically active allylic and benzylic tert-butyl peroxides 2, 6, 8, 10a and 12 in good yields and ee values of 4–20%. Oxidations of 1-substituted 1-cyclohexenes 13a–c led to mixtures of regioisomeric peroxides 16a–c, 17a–c and 18a–c with different regio- and enantioselectivities
据报道,通过使用手性双恶唑啉-铜(I)配合物,从配体3和4a - d原位生成t- BuOOH作为氧化剂,对前手性烯丙基和苄基CH化合物进行了首次对映选择性过氧化。环己烯1,环戊烯5,α当归内酯7,烯丙基苯9和2-苯基丁烷11转化成光学活性烯丙基和苄基叔丁基过氧化物2,6,8,图10A和12产量高,ee值为4–20%。1-取代的1-环己烯13a - c的氧化导致区域异构的过氧化物16a - c,17a - c和18a - c的混合物具有不同的区域选择性和对映选择性,具体取决于1-取代基和所使用的配体。对于(S)-3-叔丁基过氧-1-甲基-1-环己烯17a,观察到最高ee值(高达84%)。