Kim SM, Park JH, Kang YK, Chung YK. N-heterocyclic carbene gold(I) catalyzed transformation of N-tethered 1,5-bisallenes to 6,7-dimethylene-3-azabicyclo[3.1.1]heptanes. Angew Chem Int Ed Engl. 2009;48(25):4532–5. doi: 10.1002/anie.200806394. PMID: 19437519.