Ni-Catalyzed Regioselective 1,2-Dicarbofunctionalization of Olefins by Intercepting Heck Intermediates as Imine-Stabilized Transient Metallacycles
作者:Bijay Shrestha、Prakash Basnet、Roshan K. Dhungana、Shekhar KC、Surendra Thapa、Jeremiah M. Sears、Ramesh Giri
DOI:10.1021/jacs.7b06340
日期:2017.8.9
in styrenes by intercepting Heck C(sp3)-NiX intermediates with arylzinc reagents. This approach utilizes a readily removable imine as a coordinating group that plays a dual role of intercepting oxidative addition species derived from aryl halides and triflates to promote Heck carbometalation and stabilizing the Heck C(sp3)-NiX intermediates as transient metallacycles to suppress β-hydride elimination
Ni‐Catalyzed Arylbenzylation of Alkenylarenes: Kinetic Studies Reveal Autocatalysis by ZnX<sub>2</sub>**
作者:Roshan K. Dhungana、Rishi R. Sapkota、Laura M. Wickham、Doleshwar Niroula、Bijay Shrestha、Ramesh Giri
DOI:10.1002/anie.202110459
日期:2021.10.11
with benzyl halides and arylzinc reagents. The reaction furnishes differently substituted 1,1,3-triarylpropyl structures that are reminiscent of the cores of oligoresveratrol natural products. The reaction is also compatible for the coupling of internal alkenes, secondary benzyl halides and variously substituted arylzinc reagents. Kinetic studies reveal that the reaction proceeds with a rate-limiting
Ni-Catalyzed Regioselective 1,2-Dialkylation of Alkenes Enabled by the Formation of Two C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Bonds
作者:Roshan K. Dhungana、Rishi R. Sapkota、Laura M. Wickham、Doleshwar Niroula、Ramesh Giri
DOI:10.1021/jacs.0c09778
日期:2020.12.16
We disclose a Ni-catalyzed vicinal difunctionalization of alkenes with benzyl halides and alkylzinc reagents, which produces products with two new alkyl-alkyl bonds. This alkene dialkylation is effective in combining secondary benzyl halides and secondary alkylzinc reagents with internal alkenes, which furnishes products with three contiguous all-carbon secondary stereocenters. The products can be
Correction to “Ni-Catalyzed Regioselective 1,2-Dialkylation of Alkenes Enabled by the Formation of Two C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Bonds”
作者:Roshan K. Dhungana、Rishi R. Sapkota、Laura M. Wickham、Doleshwar Niroula、Ramesh Giri
DOI:10.1021/jacs.1c06574
日期:2021.7.21
The position of the alkene in compound 73 was misplaced. The correct position is 4,5 instead of 3,4. The compound 73 with the correct alkene position and updated spectral data are provided in the corrected Supporting Information. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/jacs.1c06574. Experimental procedures and characterization data for all compounds