1. R. Chinchilla and C. Najera, Chem. Rev., 107, 874 (2007).
2. S. F. Vasilevskiy, L. F. Semenova, and V. A. Agafonova, Khim. Geterotsikl. Soed., 1584 (2010). [Chem. Heterocycl. Compd., 46, 1283 (2010).]
3. S. F. Vasilevsky, B. Gold, T, F. Mikhailovskaya, and I. V. Alabugin, J. Phys. Org. Chem., 25, 998 (2012).
4. V. M. Dembitsky and D. O. Levitsky, Nat. Prod. Commun., 1, 405 (2006).
5. R. C. Larock, in: F. Dietrich, P. J. Stang, and R. R. Tykwinski (editors), Acetylene Chemistry: Chemistry, Biology, and Material Science, Wiley-VCH (2005).