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Updated: Sep 27, 2026

Modification and Functionalization of the Guanidine Group by Tailor-made Precursors
Published on: April 27, 2017
Ethyl 3-amino-6-phenyl-4-tolylthieno[2,3-b]pyridine-2-carboxylate
Urmila H Patel1, Chaitanya G Dave, Mukesh M Jotani
1Department of Physics, Sardar Patel University, Vallabh Vidya Nagar, Gujarat 388 120, India. u_h_patel@yahoo.com
Abstract:
In the title compound, C(23)H(20)N(2)O(2)S, the central thienopyridine ring system is essentially planar, the dihedral angle between the planes of the two rings being 0.3 (2) degrees. The terminal ethyl carboxylate group is twisted by 26.7 (3) degrees away from the central ring system. A short intramolecular hydrogen bond involving the amino N atom and the carbonyl O atom [N...O = 2.806 (4) A] forms a pseudo-six-membered ring. Significant intermolecular C-H...N, C-H...O and C-H...pi interactions contribute strongly to the stability of the structure, along with weak pi-pi-stacking interactions.
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