The CN shuffle: The described intramolecular alkenyl‐ and acylcyanation reaction of activated alkenes proceed by cleavage of a CN bond. This protocol provides access to functionalized acyclic nitriles with quaternary carbon centers under neutral and mild reaction conditions, demonstrates broad scope, and good functional‐group compatibility and versatility. Y=O or CHR4; R1,R4=electron‐withdrawing group;
Mild and highly efficient metal-free oxidative α-cyanation of N-acyl/sulfonyl tetrahydroisoquinolines
作者:Changcun Yan、Yuxiu Liu、Qingmin Wang
DOI:10.1039/c4ra12922a
日期:——
A highly efficient metal-free oxidative α-cyanation reaction of N-acyl/sulfonyl tetrahydroisoquinolines under mild conditions was developed. The reaction uses 2,2,6,6-tetramethylpiperidine N-oxide fluoroborate salt (T+BF4â) as the oxidant and trimethylsilyl cyanide as the source of the cyano group.
A facile one-pot synthesis of <i>N</i>-acyl-1-cyano-1,2,3,4-tetrahydroisoquinoline <i>via</i> a photoredox and Reissert-type reaction from 1,2,3,4-tetrahydroisoquinolines
Herein we report a protocol for the direct α-cyanation/N-acylation of THIQs via a one-pot photoredox and Reissert-type reaction using air as the oxidant and acyl cyanide as the acyl and cyano source at ambient temperature. A set of various N-acyl-1-cyano THIQs were obtained in moderate to good yields. A plausible mechanism is suggested based on preliminary mechanistic studies.