Significant effect of 5,10,15,20-meso-tetraarylporphyrinatoiron(III) chloride/triflate and acidic/neutral/basic imidazolium ionic liquids in catalytic oxidation of phenols
The influence of acidic, neutral and basic ionicliquids and their binary mixture with dichloromethane on the reactivity of iron(III)porphyrins was investigated during oxidation of phenols with hydrogen peroxide catalysed by 5,10,15,20-tetraarylporphyrinatoiron(III) chloride and 5,10,15,20-tetraarylporphyrinatoiron(III) triflate. The generation of different intermediates of iron(III) porphyrin in different
研究了酸性,中性和碱性离子液体及其与二氯甲烷的二元混合物对5,10,15,20-氯化四芳基卟啉-三价铁(III)和过氧化氢催化苯酚氧化过程中铁(III)卟啉反应性的影响。 5,10,15,20-四芳基卟啉铁(III)三氟甲磺酸盐。通过粘度,密度,UV-Vis和1 H NMR光谱研究了不同ILs中卟啉铁(III)的不同中间体的生成。(TAP)Fe III -OOH的异质裂解效率以及以Cl原子为轴向配体的铁(III)卟啉(TAP)Fe III Cl形成醌的过程受咪唑部分结构和抗衡阴离子的影响[(CH 2)4 SO 3 HMIm] CF 3 COO> [Hmim] CF 3 COO> [bmim] TFA»»在[bmim] CF 3 SO 3,[Hmim] CF 3 SO 3,[bmim] BF 4,[bmim]中的量可忽略不计PF 6和[bmim] Cl。另一方面,以三氟甲磺酸盐为轴向配体的(TAP)Fe
Synthesis of 2-substituted quinones, vitamin K3, and vitamin K1 from p-cresol. BF3·OEt2-catalyzed methyl migration of 4-tert-butyldioxycyclohexadienones
oxidation of p-cresol with tert-butyl hydroperoxide, in hexafluoro-2-propanol/toluene gave toluquinone efficiently. The reaction can be applied to the regio-selective short-step syntheses of vitamin K3 and vitaminK1 from p-cresol.