It is “2-imino-4-thiazolidinones” and not thiohydantoins as the reaction product of 1,3-disubstituted thioureas and chloroacetylchloride
Yella, Ramesh; Ghosh, Harisadhan; Patel, Bhisma K.; Green Chemistry 10 (2008) 1307–; doi:10.1039/b807775d

data_7202237
_publ_section_title
;
 It is &#x201C;2-imino-4-thiazolidinones&#x201D; and not thiohydantoins
 as the reaction product of 1,3-disubstituted thioureas and
 chloroacetylchloride
;
_journal_issue                   12
_journal_name_full               'Green Chemistry'
_journal_page_first              1307
_journal_paper_doi               10.1039/b807775d
_journal_volume                  10
_journal_year                    2008
_chemical_compound_source        synthesized
_chemical_formula_moiety         'C15 H12 N2 O S'
_chemical_formula_sum            'C15 H12 N2 O S'
_chemical_formula_weight         268.33
_chemical_melting_point          178
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      61
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   10.9047(2)
_cell_length_b                   10.0696(2)
_cell_length_c                   24.2827(6)
_cell_measurement_reflns_used    4275
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      0.00
_cell_measurement_theta_min      0.00
_cell_volume                     2666.39(10)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0572
_diffrn_reflns_av_sigmaI/netI    0.0348
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            21603
_diffrn_reflns_theta_full        28.32
_diffrn_reflns_theta_max         28.32
_diffrn_reflns_theta_min         1.68
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.235
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.337
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1120
_exptl_crystal_recrystallization_method Chloroform-hexane
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.168
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.031
_refine_ls_extinction_coef       0.0006(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.947
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         3281
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.947
_refine_ls_R_factor_all          0.0566
_refine_ls_R_factor_gt           0.0344
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0481P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0860
_refine_ls_wR_factor_ref         0.0930
_reflns_number_gt                2215
_reflns_number_total             3281
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b807775d.txt
_cod_data_source_block           ry1-125
_cod_original_sg_symbol_Hall     '-P 2ac 2ab '
_cod_database_code               7202237