Crystal structure of (Z)-ethyl 2-{5-[(2-benzylidene-3-oxo-2,3-dihydrobenzo[b][1,4]thiazin-4-yl)methyl]-1H-1,2,3-triazol-1-yl}acetate

Abstract

The title compound, C22H20N4O3S, features two fused six-membered rings linked to a 1,2,3-triazole ring which is attached to an ethyl acetate group. The heterocycle in the benzo­thia­zine residue has an envelope conformation with the S atom being the flap. The conformation of the ethyl acetate side chain, which is directed to the same side of the mol­ecule as the C6 ring of the fused-ring system, may be partially established by a pair of weak intra­molecular C—H⋯O(carbon­yl) inter­actions. The three-dimensional packing is aided by inter­molecular C—H⋯O and C—H⋯N inter­actions.

Crystal structure and Hirshfeld surface analysis of ethyl 2-{4-[(3-methyl-2-oxo-1,2-dihydroquinoxalin-1-yl)methyl]-1H-1,2,3-triazol-1-yl}acetate

“…The molecule of the title compound is build up from two fused six-membered rings linked to a 1,2,3-triazole ring which is attached to ethyl azidoacetate group (Fig. 1) (Sebbar et al, 2014;Ellouz et al, 2015). ISSN 2056-9890 Atoms C8 and N2 are displaced from the mean plane through the dihydroquinoxalinone unit by 0.0367 (13) and À0.0512 (12) Å , respectively, with the remaining atoms within 0.0222 (15) Å of the plane (r.m.s deviation of the fitted atoms is 0.0234 Å ).…”