Direct Synthesis of Alkenylboronates from Alkenes and Pinacol Diboron via Copper Catalysis
作者:Wenkui Lu、Zengming Shen
DOI:10.1021/acs.orglett.8b03599
日期:2019.1.4
We report an efficient approach for the direct synthesis of alkenylboronates using copper catalysis. The Cu/TEMPO catalyst system (where TEMPO = (2,2,6,6-tetramethylpiperidin-1-yl)oxyl) exhibits both excellent reactivity and selectivity for the synthesis of alkenylboronates, starting from inexpensive and abundant alkenes and pinacol diboron. This approach allows for the direct functionalization of
Practical and Asymmetric Reductive Coupling of Isoquinolines Templated by Chiral Diborons
作者:Dongping Chen、Guangqing Xu、Qinghai Zhou、Lung Wa Chung、Wenjun Tang
DOI:10.1021/jacs.7b04256
日期:2017.7.26
We herein describe a chiral diboron-templated highly diastereoselective and enantioselective reductive coupling of isoquinolines that provided expedited access to a series of chiral substituted bisisoquinolines in good yields and excellent ee’s under mild conditions. The method enjoys a broad substrate scope and good functional group compatibility. Mechanistic investigation suggests the reaction proceeds
Copper-Catalyzed Intermolecular Difunctionalization of Styrenes with Thiosulfonates and Arylboronic Acids via a Radical Relay Pathway
作者:Qingjin Liang、Patrick J. Walsh、Tiezheng Jia
DOI:10.1021/acscatal.9b04887
日期:2020.2.21
intermolecular difunctionalization strategy of styrenes with methyl thiosulfonates and arylboronic acids has been developed. This method provides an efficient and straightforward avenue to a broad range of 2,2-diarylethyl sulfone derivatives from readily available methyl thiosulfonates and commercially available styrene and arylboronic acid derivatives. The diverse substrate scope attests to the high
Hydrotrifluoroacetylation of Alkenes via Designer Masked Acyl Reagents
作者:Sangil Han、Kyra L. Samony、Rifat N. Nabi、Campbell A. Bache、Daniel K. Kim
DOI:10.1021/jacs.3c04294
日期:2023.5.31
functionality into organic compounds has become an important and growing research area. Although various protocols have been developed to access trifluoroketones, the use of trifluoroacetyl radicals remains virtually undeveloped. Herein, we disclose a novel method for trifluoroacetylation through an umpolung reagent, thereby transforming an electrophilicradical into a nucleophilic radical. The applicability