A highly efficient catalytic asymmetric synthesis of 1,1-disubstituted tetrahydroisoquinolines has been achieved via asymmetric alkylation or Michael addition of 1-cyanotetrahydroisoquinolines using binaphthyl-modified N-spiro-type chiral phase-transfer catalysts.
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.