Synthetic Communications p. 3269 - 3278 (2012)
Update date:2022-08-05
Topics: Characterization Purification Workup Preparation of Reaction Mixture Catalyst (if necessary) Reflux and Reaction
Thakrar, Shailesh
Bavishi, Abhay
Bhavsar, Dhairya
Parekh, Shrey
Vala, Hardev
Radadiya, Ashish
Parmar, Manisha
Savant, Mahesh
Shah, Anamik
A new series of 1,4-dihydropyridines bearing a pyrazole moiety in the 4-position were synthesized by a variation of the classical Hantzsch synthesis. The reaction of 1,3-diphenyl-1H-pyrazole-4-carbaldehyde 4a-n with 3-amino crotononitrile in the presence of glacial acetic acid afforded novel 3,5-dicyano-2,6-dimethyl 1,4-dihydropyridines 5a-n. The procedure has short reaction time (15-20 min), easy workup, and good yield of product. The structures of all synthesized compounds were well characterized by mass, infrared, 1H and 13C NMR, and elemental analysis.
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Doi:10.1016/j.ejmech.2012.06.025
(2012)Doi:10.1039/c5nj02681d
(2016)Doi:10.1039/c2cc33606e
(2012)Doi:10.1002/chem.201603783
(2016)Doi:10.1016/j.tetlet.2012.06.086
(2012)Doi:10.1016/j.jorganchem.2012.06.004
(2012)