一些新的烯烃烷氧基铊(III)化合物,C6H5C(R1)(OR3)CH2Tl(OCOR2)2 [I],是由苯乙烯和α-甲基苯乙烯与乙酸铊(III)和异丁酸在各种醇中制备的。I(R1=H) 与碘化铜、溴化铜、氯化铜、氰化物和硫氰酸铜反应生成相应的烷基卤化物和拟卤化物,C6H5CH(OR3)CH2X[II],在各种有机溶剂中,乙腈是首选溶剂为了准备II。钾盐的加入对提高Ⅱ的收率有显着效果。卤代和假卤代脱卤发生在铊先前与烷基碳相连的位置。提出了一种离子协调的分子间方案作为制备 II 的反应机制。简要讨论了 I 的核磁共振和红外光谱数据。
field of oxidation, remains a constraint for their increased use in the field. Here, thanks to the design of cross-linked artificial nonheme iron oxygenase crystals, we filled this gap by developing biobased heterogeneous catalysts capable of oxidizing carbon-carbon double bonds. First, reductive O2 activation induces selective oxidativecleavage, revealing the indestructible character of the solid catalyst
regioselective 1,2-difunctionalization of alkenes, which is a simple and efficient method for the preparation of haloethers, haloesters and halohydrins using alcohol as nucleophiles with inexpensive and commercially available N-halosuccinimide (NXS) as the halogenating reagent with low catalyst loading under mild reaction condition. The methodology is also applicable for the easy access of various alkenes such