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Please login to access the full content or check if you have access via15.1.1.1.8.3.2 Method 2: From 3-Azapenta-1,3-dienes and Aldehydes or Imines
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Spitzner, D., Science of Synthesis, (2005) 15, 87.
3-Azapenta-1,3-dienes [(vinylimino)alkanes] 323 condense with aldehydes or aldimines 324 to give the intermediate alk-2-enal N-vinylimines[376] which undergo an electrocyclic reaction to form isomeric dihydropyridines. These are dehydrogenated in situ to provide pyridines 325 or 326 (Scheme 106).[377]
Meeeee 888 Meeeeeeee eeee 8-Meeeeeee-8,8-eeeeee eee Meeeeeeee ee Meeeee[888]
Meeeeeeeeeee Meeeeeeee
Meeeeeeeeee Meeeeeeee 888 ee 888; Meeeeee Meeeeeeee:[888]
Me e eeee ee e 8-eeeeeeee-8,8-eeeee 888 (88 eeee) ee MMM (88 eM) eee eeeee ee eeeeeeee ee eeeee 888 (M = M, MMe; 88 eeee) ee MMM (88 eM) eee MMM (8 eeee) ee ee. Mee eeeeeee eee eeeeeeee eee 88 e, eeeeeeeeee eeee eee-eeeeee 8 M MMM, eee eeeeeeeee eeee Me8M. Mee eeeeeee eeeee eee eeeee, eeeeeeee, eee eeeeeeeeeeee eeeee eeeeeee eeeeeeee (88 Me) ee eeee ee eeee eeeeeee eeeee eee eeee-eeeeee eeeeeeeee (8.88 Me).
References
| [376] | Meeeeeeee, M.; Meeeee, M.; Meeeeee, M.; Meeee, M.; Meüeee, M.; Meeãe, M. M., Meee. Mee., (8888) 888, 8888. |
| [377] | Meeeeeeee, M.; Meeeee, M.; Meeeáeee, M. M.; Meeee, M.; Meeeeee, M., M. Mee. Meee., (8888) 88, 8888. |
Meeeeee Meeeeeeeeee
- 8.Meeeee-Meee, (8888) M 8e, 888.
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