Our investigation of electrochemical chlorination and bromination of pyrazoles decorated with electron-withdrawing and electron-donating groups showed that the product yield and composition depended on the substitution at the N-1 atom. We have shown for the first time the significant differences in halogenation reactivity patterns of N-unsubstituted and N-alkylpyrazoles.
Similar content being viewed by others
References
E. M. Borroni, G. Huber-Trottmann, G. J. Kilpatrick, and R. D. Norcross, WO Pat. Appl. 0162233.
J. U. Smallheer and J. R. Corte, US Pat. Appl. 2005228000.
A. G. Taveras, C. J. Aki, R. W. Bond, J. Chao, M. Dwyer, J. A. Ferreira, J. Chao, Y. Yu, J. J. Baldwin, B. Kaiser, G. Li, J. R. Merritt, P. J. Biju, K. H. Nelson, L. L. Rokosz, J. P. Jakway, G. Lai, M. Wu, E. A. Hecker, D. Lundell, and J. S. Fine, US Pat. Appl. 2004147559.
I. Yoshida, N. Yoneda, Y. Ohashi, S. Suzuki, M. Miyamoto, F. Miyazaki, H. Seshimo, J. Kamata, Y. Takase, M. Shirato, D. Shimokubo, Y. Sakuma, and H. Yokohama, WO Pat. Appl. 02088107.
W. Schaper, H. Bastiaans, S. Harmsen, U. Doeller, J. Tiebes, D. Jans, W. Hempel, U. Sanft, and M.-T. Thoenessen, DE Pat. Appl. 19962901; Chem. Abstr., 135, 76877 t (2001).
K. Eicken, W. Rohr, B. Zeeh, and B. Wuerzer, DE Pat. Appl. 2648008; Chem. Abstr., 89, 109503e (1978).
S. F. Vasilevsky, S. V. Klyatskaya and J. Elguero, Tetrahedron, 60, 6685 (2004).
J. Elguero, C. Jaramilo, and C. Pardo, Synthesis, 563 (1997).
V. Collot, P. Dallemagnet, and P. P. Bovy, Tetrahedron, 59, 6917 (1999).
B. V. Lyalin, V. A. Petrosyan, and B. I. Ugrak, Elektrokhimiya, 44, 1418 (2008). [Russ. J. Electrochem., 44, 1320 (2008).]
B. V. Lyalin, V. A. Petrosyan, and B. I. Ugrak, Izv. Akad. Nauk, Ser. Khim., 291 (2009). [Russ. Chem. Bull., Int. Ed., 58, 291 (2009).]
B. V. Lyalin, V. A. Petrosyan, and B. I. Ugrak, Elektrokhimiya, 46, 131 (2010). [Russ. J. Electrochem., 46, 123 (2010).]
H. G. O. Beсker, Einfűhrung in die Electronentheorie Organisch-Chemisher Reactionen, Veb Deutsher Verlag der Wissenshaften, Berlin (1974)
B. E. Boulton and B. A. W. Coller, Aust. J. Chem., 24, 1413 (1971).
J. D. Vaughan, D. G. Lambert, and V. L. Vaughan, J. Am. Chem. Soc., 86, 2857 (1964).
M. S. Pevzner, Adv. Heterocycl. Chem., 75, 1 (1999).
B. V. Lyalin, V. A. Petrosyan, and B. I. Ugrak, Izv. Akad. Nauk, Ser. Khim., 1512 (2010). [Russ. Chem. Bull., Int. Ed., 59, 1549 (2010).]
L. I. Belen'kii and N. D. Chuvylkin, Khim. Geterotsikl. Soedin., 1535 (1996). [Chem. Heterocycl. Compd., 32, 1319 (1996).]
R. Hüttel, О. Schäfe and G. Welzee, Justus Liebigs Ann. Chem., 598, 186 (1956).
R. Hüttel, H. Wagner and P. Jocum, Justus Liebigs Ann. Chem., 593, 179 (1955).
B. V. Lyalin and V. A. Petrosyan, Izv. Akad. Nauk, Ser. Khim., 206 (2012). [Russ. Chem. Bull., Int. Ed., 61, 209 (2012).]
A. E. Agronomov, Selected topics of organic chemistry, Khimiya, Moscow (1990), p. 329.
P. G. Baraldi, P. Cozzi, C. Geroni, N. Mongelli, R. Romagnoli, and G. Spalluto, Bioorg. Med. Chem., 7, 251 (1999).
S. F. Vasilevsky and M. S. Shvartsberg, Izv. Akad. Nauk SSSR, Ser. Khim., 1071 (1980). [Bull. Acad. Sci. USSR, Div. Chem. Sci., 29, 778 (1980).]
P. R. Mullens, Tetrahedron Lett., 50, 6783 (2009).
J. L. Huppatz and L. John, Aust. J. Chem., 36, 135 (1983).
A. A. Zaitsev, I. L. Dalinger, A. M. Starosotnikov, T. K. Shkineva, and S. A. Shevelev, Zh. Org. Khim., 41, 1538 (2005). [Russ. J. Org. Chem., 41, 1507 (2005).]
V. P. Perevalov, Yu. A. Manayev, L. I. Baryshnenkova, E. E. Kanep, M. A. Andreeva, and B. I. Stepanov, Khim. Geterotsikl. Soedin., 1350 (1987). [Chem. Heterocycl. Compd., 23, 1081 (1987).]
V. P. Perevalov, L. I. Baryshnenkova, M. A. Andreeva, Yu. A. Manaev, I. A. Denisova, B. I. Stepanov, and V. I. Seraya, Khim. Geterotsikl. Soedin., 1672 (1983). [Chem. Heterocycl. Compd., 19, 1322 (1983).]
O. S. Attaryan, G. A. Akopyan, K. S. Badalyan, and G. V. Astratyan, Zh. Org. Khim., 43, 1739 (2007). [Russ. J. Org. Chem., 43, 1740 (2007).]
M. A. Andreeva, A. K. Karim, E. A. Denisova, V. P. Perevalov, and B. I. Stepanov, Zh. Obsch. Khim., 50, 2116 (1980). [Russ. J. Gen. Chem., 50, 2370 (1980).]
B. I. Stepanov, V. P. Perevalov, M. A. Andreeva, and A. K. Karim, Zh. Obsch. Khim., 52, 2588 (1982). [Russ. J. Gen. Chem., 52, 2588 (1982).]
J. Pelleter and F. Renaud, Org. Process Res. Dev., 13, 698 (2009).
J. Elguero, R. Jacquier, and H. C. N. Tien Duc, Bull. Soc. Chim. Fr., 3727 (1966).
Y. Iwasawa, S. Yamamoto, K. Suzuki, H. Murakami, and F. Suzuki, EP Pat. Appl. 0366329.
Author information
Authors and Affiliations
Corresponding author
Additional information
*Dedicated to my dear friend Jānis Stradiņš, a uniquely talented scientist, with the warmest greetings and memories of unforgettable adventures in the field of polarography.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1726-1738, November, 2013.
Rights and permissions
About this article
Cite this article
Lyalin, B.V., Petrosyan, V.A. The Reactivity Trends in Electrochemical Chlorination and Bromination of N-Substituted and N-Unsubstituted Pyrazoles*. Chem Heterocycl Comp 49, 1599–1610 (2014). https://doi.org/10.1007/s10593-014-1411-9
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10593-014-1411-9