Synthetic route to chiral tetrahydroquinoxalines via ring-opening of activated aziridines.
Ghorai, Manas K.; Sahoo, Ashis K.; Kumar, Sarvesh; Organic letters 13 (2011) 5972–5975; doi:10.1021/ol2023906

data_1502536
_publ_section_title
;
 Synthetic route to chiral tetrahydroquinoxalines via ring-opening of
 activated aziridines.
;
_journal_issue                   22
_journal_name_full               'Organic letters'
_journal_page_first              5972
_journal_page_last               5975
_journal_paper_doi               10.1021/ol2023906
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C18 H19 N2 O2 S'
_chemical_formula_weight         327.41
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                78.880(5)
_cell_angle_beta                 78.684(5)
_cell_angle_gamma                84.081(5)
_cell_formula_units_Z            2
_cell_length_a                   8.119(5)
_cell_length_b                   8.143(5)
_cell_length_c                   12.748(5)
_cell_measurement_temperature    293(2)
_cell_volume                     809.0(8)
_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      293(2)
_diffrn_measured_fraction_theta_full 0.922
_diffrn_measured_fraction_theta_max 0.922
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0283
_diffrn_reflns_av_sigmaI/netI    0.0761
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5028
_diffrn_reflns_theta_full        28.29
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         2.56
_exptl_absorpt_coefficient_mu    0.211
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.344
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             346
_exptl_crystal_size_max          0.087
_exptl_crystal_size_mid          0.064
_exptl_crystal_size_min          0.031
_refine_diff_density_max         1.834
_refine_diff_density_min         -0.834
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.093
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3702
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.096
_refine_ls_R_factor_all          0.1537
_refine_ls_R_factor_gt           0.0920
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0943P)^2^+2.4718P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2120
_refine_ls_wR_factor_ref         0.2696
_reflns_number_gt                2220
_reflns_number_total             3702
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol2023906_si_002.cif
_cod_data_source_block           7a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P-1   '
_cod_database_code               1502536