Solvolysis of Styryliodonium Salt: Products, Rates, and Mechanisms
作者:Tadashi Okuyama、Yoshimi Ishida、Masahito Ochiai
DOI:10.1246/bcsj.72.163
日期:1999.2
The solvolysis of phenyl[(E)-styryl]iodonium tetrafluoroborate in various solvents was examined at 50—70 °C by means of product and kinetic studies with the normal and labeled substrates. The reactions involved are α-elimination and substitutions with configurational retention and inversion. In methanol and ethanol, the main reaction is α-elimination, along with about 5% of substitution with the ratio
苯基[(E)-苯乙烯基]四氟硼酸碘鎓在各种溶剂中的溶剂分解在 50-70 °C 下通过产物和动力学研究与正常和标记底物进行了研究。所涉及的反应是具有构型保留和反转的α-消除和取代。在甲醇和乙醇中,主要反应是α-消除,伴随有约5%的取代,转化/保留比从4/6到3/7。随着溶剂碱度的降低,反应速率和α-脱除率降低,同时转化率/取代保留率也降低。在 2,2,2-三氟乙醇中,仅观察到保留的取代。标记实验表明,保留产物的烯烃氢之间发生了完全的同位素扰乱,而氘保留在反转产物的原始位置。推断取代机制涉及平行途径:SN1 型与亚乙烯基苯...
Patel, Monika; Sushmita; Verma, Akhilesh Kumar, Indian Journal of Heterocyclic Chemistry, 2018, vol. 28, # 1, p. 169 - 175
Copper-mediated trifluoroethoxylation of vinyl bromides
作者:Jianping Ding、Yi You、Zhiqiang Weng
DOI:10.1016/j.tetlet.2016.03.023
日期:2016.4
Vinyl bromides were subjected to the trifluoroethoxylation reactions with copper reagent [(phen)2Cu][OCH2CF3] at 80 °C in DMF with the presence of NaOt-Bu to afford the trifluoroethyl vinylethers in good yields. A range of functional groups, such as cyano, nitro, alkoxy, trifluoromethyl, halide, and heterocyclic groups were well tolerated. This approach is also amenable to being performed out on gram
在NaO t -Bu存在下,于80℃,在DMF中,使用铜试剂[[phen] 2 Cu] [OCH 2 CF 3 ]对乙烯基溴进行三氟乙氧基化反应,从而以良好的收率得到三氟乙基乙烯基醚。各种官能团,例如氰基,硝基,烷氧基,三氟甲基,卤化物和杂环基均具有良好的耐受性。该方法也适合于以克为单位执行。