Yoshihiko Ito, Kazuhiro Kobayashi, Takeo Saegusa;
Author's Voice: [...]Herein, we wish to report a new and versatile synthesis of indole derivatives based on selective ortholithiation of the alkyl group in o-alkylphenylisocyanides and subsequent intramolecular ring closure.[...]
J. Am. Chem. Soc.; 1977; 99(10); 3532-3534.
____
Fulltext: http://pharmacist8.tripod.com/o-isocyanotoluenes.pdf (http://pharmacist8.tripod.com/o-isocyanotoluenes.pdf)
Post 446390 (https://www.thevespiary.org/talk/index.php?topic=13300.msg44639000#msg44639000)
(pHarmacist: "ortho-isocyanotoluenes in indole synthesis", Tryptamine Chemistry)