Cooperative Palladium/Lewis Acid-Catalyzed Transfer Hydrocyanation of Alkenes and Alkynes Using 1-Methylcyclohexa-2,5-diene-1-carbonitrile
作者:Anup Bhunia、Klaus Bergander、Armido Studer
DOI:10.1021/jacs.8b10651
日期:2018.11.28
represents a clean and safe alternative to hydrocyanation processes using toxic HCN gas. Such reactions provide access to pharmaceutically important nitrile derivatives starting with alkenes and alkynes. Herein, an efficient and practical cooperative palladium/Lewis acid-catalyzed transfer hydrocyanation of alkenes and alkynes is presented using 1-methylcyclohexa-2,5-diene-1-carbonitrile as a benign and readily
Development of an Operationally Simple, Scalable, and HCN-Free Transfer Hydrocyanation Protocol Using an Air-Stable Nickel Precatalyst
作者:Julia C. Reisenbauer、Benjamin N. Bhawal、Nicola Jelmini、Bill Morandi
DOI:10.1021/acs.oprd.1c00442
日期:2022.4.15
scalability and robustness of the catalytic process were demonstrated by the hydrocyanation of α-methylstyrene on a 100 mmol scale (11.4 g of product obtained) using 1 mol % of the Ni catalyst. In addition, the feasibility of the dehydrocyanation protocol using the air-stable Ni(II) precatalyst and norbornadiene as a sacrificial acceptor was showcased by the selective conversion of an aliphatic nitrile into
Mechanistic Investigation of the Nickel-Catalyzed Transfer Hydrocyanation of Alkynes
作者:Julia C. Reisenbauer、Patrick Finkelstein、Marc-Olivier Ebert、Bill Morandi
DOI:10.1021/acscatal.3c02977
日期:2023.9.1
cleavage step. In this work, in-depth kinetic and computationalstudies using alkynes as substrates were used to elucidate the overall reaction mechanism of this transfer hydrocyanation, with a particular focus on the activation of the C(sp3)–CN bond to generate the active H–Ni–CN transfer hydrocyanation catalyst. Comparisons of experimentally and computationally derived 13C kinetic isotope effect data support