1. (a) Huisgen, R. Angew. Chem., Int. Ed. 1963, 2, 565. (b) Huisgen, R. Angew. Chem., Int. Ed. 1963, 2, 633. (c) 1,3-Dipolar Cycloaddition Chemistry; Padwa, A., Ed.; Wiley: New York, 1984. (d) Synthetic Applications of 1,3-Dipolar Cycloaddition Chemistry Toward Heterocycles and Natural Products; Padwa, A.; Pearson, W. H., Eds.; Wiley: New York, 2002.
2. (a) Nudenberg, W.; Butz, L. W. J. Am. Chem. Soc. 1944, 66, 307. (b) Wittig, G.; Pohmer, L. Chem. Ber. 1956, 89, 1334. (c) Cava, M. P.; Mitchell, M. J. J. Am. Chem. Soc. 1959, 81, 5409. (d) Yur'ev, Yu. K.; Zefirov, N. S.; Ivanova, R. A.; Pek, G. Yu. Chem. Heterocycl. Compd. 1965, 1, 1. [Khim. Geterotsikl. Soedin. 1965, 5.] (e) Sasaki, T.; Kanematsu, K.; Hayakawa, K.; Uchide, M. J. Chem. Soc., Perkin Trans. 1 1972, 2750. (f) Iten, P. X.; Hofmann, A. A.; Eugster, C. H. Helv. Chim. Acta. 1979, 62, 2202. (g) Sasaki, T.; Eguchi, S.; Yamaguchi, M.; Esaki, T. J. Org. Chem. 1981, 46, 1800. (h) Orugunty, R. S.; Ghiviriga, I.; Abboud, K. A.; Battiste, M. A.; Wright, D. L. J. Org. Chem. 2004, 69, 570.
3. (a) Hunziker, D.; Mattei, P.; Mauser, H.; Prunotto, M.; Ullmer, C. WO 2013186159 A1. (b) Mattei, P.; Hunziker, D.; Giorgio, P.; Hert, J.; Rudolph, M.; Wang, L. WO Patent 2015078803 A1. (c) Hunziker, D.; Mattei, P.; Mauser, H.; Prunotto, M.; Ullmer, C. US Patent 2015099734 A1. (d) Saito, S.; Okamoto, M.; Shinoda, S.; Kushiro, T.; Koshiba, T.; Kamiya, Y.; Hirai, N.; Todoroki, Y.; Sakata, K.; Nambara, E.; Mizutani, M. Biosci., Biotechnol., Biochem. 2006, 70, 1731.
4. (a) Bartlett, P. D.; Combs, G. L. J. Org. Chem. 1984, 49, 625. (b) Fisera, L.; Pavlovic, D. Collect. Czech. Chem. Commun. 1984, 49, 1990. (c) Reymond, J.-L.; Vogel, P. Tetrahedron Lett. 1988, 29, 3695. (d) Nativi, C.; Reymond, J.-L.; Vogel, P. Helv. Chim. Acta 1989, 72, 882. (e) Allemann, S.; Reymond, J.-L.; Vogel, P. Helv. Chim. Acta. 1990, 73, 674. (f) Auberson, Y.; Vogel, P. Tetrahedron 1990, 46, 7019. (g) Hunenberger, P.; Allemann, S.; Vogel, P. Carbohydr. Res. 1994, 257, 175.
5. (a) Varlamov, A. V.; Boltukhina, E. V.; Zubkov, F. I.; Sidorenko, N. V.; Chernyshev, A. I.; Grudinin, D. G. Chem. Heterocycl. Compd. 2004, 40, 22. [Khim. Geterotsikl. Soedin. 2004, 27.] (b) Zubkov, F. I.; Zaytsev, V. P.; Nikitina, E. V.; Khrustalev, V. N.; Gozun, S. V.; Boltukhina, E. V.; Varlamov, A. V. Tetrahedron 2011, 67, 9148. (c) Zubkov, F. I.; Zaytsev, V. P.; Puzikova, E. S.; Nikitina, E. V.; Khrustalev, V. N.; Novikov, R. A.; Varlamov, A. V. Chem. Heterocycl. Compd. 2012, 48, 514. [Khim. Geterotsikl. Soedin. 2012, 549.] (d) Zubkov, F. I.; Zaytsev, V. P.; Airiyan, I. K.; Golubev, V. D.; Puzikova, E. S.; Sorokina, E. A.; Nikitina, E. V.; Varlamov, A. V. Russ. Chem. Bull., Int. Ed. 2012, 61, 600. [Izv. Akad. Nauk, Ser. Khim. 2012, 598.] (e) Zaytsev, V. P.; Zubkov, F. I.; Mertsalov, D. F.; Orlova, D. N.; Sorokina, E. A.; Nikitina, E. V.; Varlamov, A. V. Russ. Chem. Bull., Int. Ed. 2015, 64, 112. [Izv. Akad. Nauk, Ser. Khim. 2015, 112.]