Zeitschriftenartikel
Fürstner, A.;
Hupperts, A.;
Ptock, A.;
Janssen, E. “Site Selective” Formation of Low-Valent Titanium Reagents: An “Instant” Procedure for the Reductive Coupling of Oxo Amides to Indoles.
The Journal of Organic Chemistry 1994,
59, 5215–5229.