作者:Amar R. Mohite、Ravindra S. Phatake、Pooja Dubey、Mohamed Agbaria、Alexander I. Shames、N. Gabriel Lemcoff、Ofer Reany
DOI:10.1021/acs.joc.0c01431
日期:2020.10.16
conditions expedited by the presence of substoichiometric amounts of thiourea additives is presented. The amount of thiourea added dictates the pathway of the reaction, which may diverge from the desired halogenation reaction toward oxidation of the alcohol, in the absence of thiourea, or toward starting material recovery when excess thiourea is used. Both bromination and chlorination were highly efficient
Silica Chloride (SiO<sub>2</sub>-Cl), a New Heterogeneous Reagent, for the Selective and Efficient Conversion of Benzylic Alcohols to Their Corresponding Chlorides and Iodides
Abstract Structurally different benzylic alcohols were efficiently converted to their corresponding chlorides by silica chloride (SiO2-Cl) in CHCl3 at room temperature. Silica chloride is also able to convert benzylic alcohols to their iodides in the presence of NaI in a mixture of CH3CN/CHCl3 in excellent yields.
摘要 在室温下,在 CHCl3 中的氯化硅 (SiO2-Cl) 可以将结构不同的苄醇有效地转化为其相应的氯化物。在 NaI 存在下,在 CH3CN/ 混合物中,氯化硅也能够以极好的收率将苄醇转化为其碘化物。
Lewis Basic Salt-Promoted Organosilane Coupling Reactions with Aromatic Electrophiles
作者:Tyler W. Reidl、Jeffrey S. Bandar
DOI:10.1021/jacs.1c05764
日期:2021.8.11
Lewis basic saltspromote benzyltrimethylsilane coupling with (hetero)aryl nitriles, sulfones, and chlorides as a new route to 1,1-diarylalkanes. This method combines the substrate modularity and selectivity characteristic of cross-coupling with the practicality of a base-promoted protocol. In addition, a Lewis base strategy enables a complementary scope to existing methods, employs stable and easily
Nickel-Catalyzed Asymmetric Reductive Cross-Coupling Between Vinyl and Benzyl Electrophiles
作者:Alan H. Cherney、Sarah E. Reisman
DOI:10.1021/ja508067c
日期:2014.10.15
between vinyl bromides and benzyl chlorides has been developed. This method provides direct access to enantioenriched products bearing aryl-substituted tertiary allylic stereogenic centers from simple, stable starting materials. A broad substrate scope is achieved under mild reaction conditions that preclude the pregeneration of organometallic reagents and the regioselectivity issues commonly associated with
已开发出一种 Ni 催化的溴乙烯和苄基氯之间的不对称还原交叉偶联。该方法提供了从简单、稳定的起始材料直接获得带有芳基取代的叔烯丙基立体中心的对映体富集的产品。在温和的反应条件下实现了广泛的底物范围,排除了有机金属试剂的预生成和通常与不对称烯丙基芳基化相关的区域选择性问题。
Metal-free regioselective hydrochlorination of unactivated alkenes<i>via</i>a combined acid catalytic system
作者:Shengzong Liang、Gerald B. Hammond、Bo Xu
DOI:10.1039/c7gc03665e
日期:——
A combined acid HCl/DMPU-acetic acid catalytic system was used in the hydrochlorination of a wide range of unactivated alkenes.