You are using Science Of Synthesis as a Guest.
Please login to access the full content or check if you have access via12.5 Product Class 5: Azaindolizines with Two Nitrogen Atoms in the Five-Membered Ring
Please login to access the full content or check if you have access via
Hajos, G.; Riedl, Z., Science of Synthesis, (2002) 12, 613.
General Introduction
In this section, isomers of benzimidazole and of indazole will be treated, where one of the nitrogen atoms is located in a bridgehead position. Depending on the position of the nonbridgehead nitrogen atom of the five-membered ring, three types of such heterocyclic systems exist: imidazo[1,2-a]pyridine (1), imidazo[1,5-a]pyridine (2), and pyrazolo[1,5-a]pyridine (3), as shown in Scheme 1.
Meeeee 8 Meeee ee Meeeeeeeeeeee Meee Meeeeee
Meeeeee eeeee eeeeeeeeee, eee eeeeeeeee ee eeeee eeeeeeeeeeee eeeeeeeeee eeeeeeeeee eeeeeeee eeeee ee eee eee-eeeeeeee eeee eeee eeee ee eeeeeeeee. Meee, eeeee eeeeeeeeee eeeeeeeeee, eee eeeeeeeee- eee eeeeeeeeee 8 eee 8 ee eeee ee eee eeeeeeee eeeeeeeeee- eee eeeeeeeeee 8, eeee ee eeeeeee ee eeee eeeeeeeeeeee. Meeeeeeeeee, ee eeeee ee eeeeeee eeeeeeeeeee eeeeeeeeee, eeee eeeee eeeeeeeee ee eeeee eeee eeeeeee eeee eeee ee eeeeeeeee.
Return to Top