Mild and highly efficient metal-free oxidative α-cyanation of N-acyl/sulfonyl tetrahydroisoquinolines†
Abstract
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+BF4−) as the oxidant and trimethylsilyl cyanide as the source of the cyano group.