<i>N</i>-Heterocyclic Carbene Catalyzed 1,6-Conjugate Addition of Me<sub>3</sub>Si-CN to <i>para</i>-Quinone Methides and Fuchsones: Access to α-Arylated Nitriles
N-heterocyclic carbene (NHC) as a catalyst is described. This protocol comprises an NHC catalyzed activation of Me3Si-CN followed by 1,6-conjugate addition of cyanide to para-quinone methides (p-QMs) and fuchsones leading to α-diaryl- and α-triaryl nitriles in good to excellent yields.
Accessing α-Arylated Nitriles via BF<sub>3</sub>·OEt<sub>2</sub> Catalyzed Cyanation of <i>para</i>-Quinone Methides Using <i>tert-</i>Butyl Isocyanide as a Cyanide Source
作者:Sachin R. Shirsath、Ganesh H. Shinde、Aslam C. Shaikh、M. Muthukrishnan
DOI:10.1021/acs.joc.8b01926
日期:2018.10.5
for the synthesis of α-diaryl and α-triaryl nitriles has been reported. This protocol allows α-diaryl- and α-triaryl nitriles to be accessed in good to excellent yields and with a broad substrate scope, which could be further functionalized to give a versatile set of products. This is the first example wherein tert-butyl isocyanide has been used as a cyanide source for the 1,6-conjugate addition.