Abstract Functionalized spiro-tetrahydro-β-carbolines were formed by an efficient gold (I)- catalyzed rearrangement reaction of alkynylaziridine indoles. The reaction involved a Friedel–Crafts type intramolecular reaction of alkynylaziridine indoles, following by hydroamination of aminoallene intermediate.
[Mitchell, Glynn; Rees, Charles W. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1987 , p. 413 - 422]