Generation of Donor/Donor Copper Carbenes through Copper-Catalyzed Diyne Cyclization: Enantioselective and Divergent Synthesis of Chiral Polycyclic Pyrroles
作者:Feng-Lin Hong、Ze-Shu Wang、Dong-Dong Wei、Tong-Yi Zhai、Guo-Cheng Deng、Xin Lu、Rai-Shung Liu、Long-Wu Ye
DOI:10.1021/jacs.9b09303
日期:2019.10.23
yields with wide substratescope and excellent enantioselectivities (up to 97:3 e.r.). Importantly, this protocol represents the first copper-catalyzed asymmetric diyne cyclization. Moreover, mechanisticstudies revealed that the generation of donor/donor copper carbenes is presumably involved in this 1,5-diyne cyclization, which is distinctively different from the related gold catalysis, and thus it constitutes
Copper‐Catalyzed Asymmetric Diyne Cyclization via [1,2]‐Stevens‐Type Rearrangement for the Synthesis of Chiral Chromeno[3,4‐
<i>c</i>
]pyrroles
作者:Feng‐Lin Hong、Chong‐Yang Shi、Pan Hong、Tong‐Yi Zhai、Xin‐Qi Zhu、Xin Lu、Long‐Wu Ye
DOI:10.1002/anie.202115554
日期:2022.2.7
copper-catalyzed asymmetric cascade cyclization/[1,2]-Stevens-type rearrangement is disclosed, affording valuable chiral chromeno[3,4-c]pyrroles bearing a quaternary carbon stereocenter in generally moderate to good yields with excellent enantioselectivities. Importantly, this protocol represents the first catalytic asymmetric [1,2]-Stevens-type rearrangement based on alkynes and the first asymmetric formal carbene
公开了一种铜催化的不对称级联环化/[1,2]-Stevens 型重排,以通常中等至良好的产率和优异的对映选择性提供有价值的手性色烯并[3,4- c ]吡咯,其具有季碳立体中心。重要的是,该协议代表了第一个基于炔烃的催化不对称 [1,2]-史蒂文斯型重排和第一个不对称的形式卡宾插入 Si-O 键。
NaBAr
<sup>F</sup>
<sub>4</sub>
‐Catalyzed Oxidative Cyclization of 1,5‐ and 1,6‐Diynes: Efficient and Divergent Synthesis of Functionalized γ‐ and δ‐Lactams
作者:Bo‐Han Zhu、Cai‐Ming Wang、Hong‐Yu Su、Long‐Wu Ye
DOI:10.1002/cjoc.201800437
日期:2019.1
An efficient NaBArF4‐catalyzedoxidativecyclization of readily available 1,5‐ and 1,6‐diynes has been developed. Importantly, this transition metal‐free oxidative catalysis proceeds via a presumable Lewis acid‐catalyzed SN2’ pathway, which is distinct from the relevant oxidative rhodium and gold catalysis. This method leads to the facile and practical construction of a diverse range of synthetically
已经开发出一种高效的NaBAr F 4催化氧化环化反应,该反应可轻松获得1,5和1,6二炔。重要的是,这种无过渡金属的氧化催化是通过一种可能的路易斯酸催化的S N 2'途径进行的,这与相关的氧化铑和金的催化作用不同。这种方法可以轻松实用地构建各种合成有用的γ-和δ-内酰胺,且收率范围从大到优,而且底物范围广。
Copper-Catalyzed Si–H Bond Insertion Reaction of <i>N</i>-Propargyl Ynamides with Hydrosilanes
作者:En-He Huang、Ying-Qi Zhang、Da-Qiu Cui、Xin-Qi Zhu、Xiao Li、Long-Wu Ye
DOI:10.1021/acs.orglett.1c03830
日期:2022.1.14
Transition-metal-catalyzed Si–H bondinsertion reactions are generally limited to stabilized diazo compounds. An efficient copper-catalyzed Si–H bondinsertion reaction of N-propargyl ynamides with hydrosilanes is described, allowing practical and atom-economic construction of valuable organosilanes in generally moderate to excellent yields under mild reaction conditions. Notably, this reaction constitutes
Copper-Catalyzed Cyclization of <i>N</i>-Propargyl Ynamides with Borane Adducts through B–H Bond Insertion
作者:Guang-Yu Zhu、Tong-Yi Zhai、Xiao Li、Chong-Yang Shi、Xin-Qi Zhu、Long-Wu Ye
DOI:10.1021/acs.orglett.1c03092
日期:2021.10.15
An efficient copper-catalyzed cyclization of N-propargyl ynamides with boraneadducts through B–H bond insertion has been developed. A series of valuable organoboron compounds are constructed in generally good yields with a wide substrate scope and good functional group tolerance under mild reaction conditions. Importantly, this protocol via vinyl cation intermediates constitutes a novel way of B–H