Ethyl 2-[(Z)-2-cyanoimino-1,3-thiazolidin-3-yl]acetate

In the title molecule, C8H11N3O2S, the puckering amplitude of the thiazolidine ring is q 2 = 0.3011 (5) Å and the conformation is an envelope. There are weak intermolecular C—H⋯O interactions which stabilize the crystal structure.

In the title molecule, C 8 H 11 N 3 O 2 S, the puckering amplitude of the thiazolidine ring is q 2 = 0.3011 (5) Å and the conformation is an envelope. There are weak intermolecular C-HÁ Á ÁO interactions which stabilize the crystal structure.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HG2405).

Comment
Thiazolidine is an important kind of group in organic chemistry. Many compounds containing Thiazolidine groups possess a broad spectrum of biological activities (Iwata et al., 1988). Here, we report the crystal structure of (I).

Experimental
A solution of (Z)-(thiazolidin-2-ylideneamino)formonitrile 1.27 g (10 mmol) and sodium hydride 0.3 g dissolved in anhydrous acetonitrile (20 ml), and dropwise added over a period of 10 min to a solution of ethyl 2-chloroacetate 1.23 (10 mmol) in acetonitrile (10 ml) at 273 K. The mixture was stirred at 353 K for 3 h. The solvent was removed and the residue was purified by recrystall from ethanol to give I as a white solid (1.92 g, 90%). Single crystals suitable for X-ray measurements were obtained by recrystallization from ethanol at room temperature.

Refinement
H atoms were positioned geometrically and refined using a riding model, with C-H = 0.96 or 0.97 Å, with U iso (H) = 1.2 times U eq (C) and 1.5 times U eq (C) for the methyl H atoms. Fig. 1. The molecular structure of (I), with atom labels and 40% probability displacement ellipsoids for non-H atoms. as those based on F, and R-factors based on ALL data will be even larger.