M. Ishikura et M. Terashima, A POSSIBLE PATHWAY FOR THE REACTION OF TRIETHYL (1-METHYLINDOL-2-YL)BORATE WITH CATIONIC ELECTROPHILES IN THE PRESENCE OF CUPROUS CYANIDE, Journal of heterocyclic chemistry, 31(4), 1994, pp. 977-980
On the preferential formation of 3-substituted indoles from triethyl (
1-methylindol-2-yl)borate in the presence of cuprous cyanide and catio
nic electrophiles, it was supposed that the reaction seems to proceed
through a transposition path from boron to copper.