Ring-opening and -expansion of 2,2'-biaziridine: access to diverse enantiopure linear and bicyclic vicinal diamines.
Bailey, Stephen J.; Wales, Steven M.; Willis, Anthony C.; Keller, Paul A.; Organic letters 16 (2014) 4344–4347; doi:10.1021/ol502164b

data_1517511
_publ_section_title
;
 Ring-opening and -expansion of 2,2'-biaziridine: access to diverse
 enantiopure linear and bicyclic vicinal diamines.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              4344
_journal_page_last               4347
_journal_paper_doi               10.1021/ol502164b
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_compound_source        ' from U of Wollongong'
_chemical_formula_moiety         'C20 H24 N2 O4 S2'
_chemical_formula_sum            'C20 H24 N2 O4 S2'
_chemical_formula_weight         420.55
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_audit_creation_date             13-12-20
_audit_creation_method           CRYSTALS_ver_14.40
_audit_update_record
;
2013-12-20 - Report on C20 H24 N2 O4 S2
             by Anthony C. Willis
             for Paul Keller

2013-12-20 - passes checkcif tests with minor warnings  
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.3346(1)
_cell_length_b                   10.9278(2)
_cell_length_c                   18.3511(4)
_cell_measurement_reflns_used    20881
_cell_measurement_temperature    200
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3
_cell_volume                     2072.47(6)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics
; 
ORTEP-II (Johnson 1976) in teXsan (MSC, 1992-1997)
;
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      200
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       ' \f and \w scans with CCD '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.039
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            27673
_diffrn_reflns_theta_full        27.486
_diffrn_reflns_theta_max         27.486
_diffrn_reflns_theta_min         2.713
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.285
_exptl_absorpt_correction_T_max  0.97
_exptl_absorpt_correction_T_min  0.92
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.348
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             888
_exptl_crystal_size_max          0.420
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.110
_refine_diff_density_max         0.18
_refine_diff_density_min         -0.36
_refine_ls_abs_structure_details 'Flack (1983), 2064 Friedel-pairs'
_refine_ls_abs_structure_Flack   0.02(6)
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9978
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         4758
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0389
_refine_ls_R_factor_gt           0.0339
_refine_ls_shift/su_max          0.0006516
_refine_ls_shift/su_mean         0.0000757
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.05P)^2^ + 0.60P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0867
_refine_ls_wR_factor_gt          0.0837
_refine_ls_wR_factor_ref         0.0867
_reflns_limit_h_max              13
_reflns_limit_h_min              -13
_reflns_limit_k_max              14
_reflns_limit_k_min              0
_reflns_limit_l_max              23
_reflns_limit_l_min              0
_reflns_number_gt                4326
_reflns_number_total             4760
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   3.22
_oxford_diffrn_Wilson_scale      2.16
_oxford_refine_ls_r_factor_ref   0.0389
_oxford_refine_ls_scale          0.6845(13)
_oxford_reflns_number_all        4758
_oxford_reflns_threshold_expression_ref I>-10.0\s(I)
_oxford_structure_analysis_title 'kel1309 At 12:40 on 18/12 - scalepack'
_cod_data_source_file            ol502164b_si_005.cif
_cod_data_source_block           kel1309
_cod_original_sg_symbol_Hall     'P 2ac 2ab '
_cod_original_sg_symbol_H-M      'P 21 21 21 '
_cod_database_code               1517511
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
CONT ENANTIO 
RIDE N   (   1,X'S) H   (   1,X'S) 
RIDE C   (   1,X'S) H   (  11,X'S) H   (  12,X'S) 
RIDE C   (   2,X'S) H   (  21,X'S) 
RIDE C   (   3,X'S) H   (  31,X'S) 
RIDE C   (   4,X'S) H   (  41,X'S) H   (  42,X'S) 
RIDE C   (   5,X'S) H   (  51,X'S) 
RIDE C   (   6,X'S) H   (  61,X'S) H   (  62,X'S) 
RIDE C   (   8,X'S) H   (  81,X'S) 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  11,X'S) H   ( 111,X'S) 
RIDE C   (  12,X'S) H   ( 121,X'S) 
RIDE C   (  13,X'S) H   ( 131,X'S) H   ( 132,X'S) H   ( 133,X'S) 
RIDE C   (  15,X'S) H   ( 151,X'S) 
RIDE C   (  16,X'S) H   ( 161,X'S) 
RIDE C   (  18,X'S) H   ( 181,X'S) 
RIDE C   (  19,X'S) H   ( 191,X'S) 
RIDE C   (  20,X'S) H   ( 201,X'S) H   ( 202,X'S) H   ( 203,X'S) 
END                                                                             
;
_iucr_refine_instruction_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;