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.
PISKOV, V. B.;CHIRYATEV, S. N.;ZAVYALOV, S. I.;NAZAROV, V. G.;KASPEROVICH+
作者:PISKOV, V. B.、CHIRYATEV, S. N.、ZAVYALOV, S. I.、NAZAROV, V. G.、KASPEROVICH+
DOI:——
日期:——
Efficient Asymmetric Synthesis of 1-Cyano-tetrahydroisoquinolines from Lipase Dual Activity and Opposite Enantioselectivities in α-Aminonitrile Resolution
Dual promiscuous racemization/amidation activities of lipases leading to efficient dynamic kinetic resolution protocols of racemic α‐aminonitrile compounds are described. α‐Amidonitrile products of high enantiomeric purity could be formed in high yields. Several lipasesfrom different sources were shown to exhibit the dual catalytic activities, where oppositeenantioselectivities could be recorded