Efficient Synthesis of Chiral 2,2'-Bipyrrolidines by an anti-Selective Alkene Diamination.
Müller, Christian H; Fröhlich, Roland; Daniliuc, Constantin G.; Hennecke, Ulrich; Organic letters 14 (2012) 5944–5947; doi:10.1021/ol302855z

data_1508771
_publ_section_title
;
 Efficient Synthesis of Chiral 2,2'-Bipyrrolidines by an anti-Selective
 Alkene Diamination.
;
_journal_issue                   23
_journal_name_full               'Organic letters'
_journal_page_first              5944
_journal_page_last               5947
_journal_paper_doi               10.1021/ol302855z
_journal_volume                  14
_journal_year                    2012
_chemical_formula_sum            'C20 H22 Br2 N2'
_chemical_formula_weight         450.22
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 103.939(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   15.0501(6)
_cell_length_b                   30.2465(8)
_cell_length_c                   8.6794(2)
_cell_measurement_reflns_used    6690
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      68.25
_cell_measurement_theta_min      0.88
_cell_volume                     3834.6(2)
_computing_cell_refinement       'Collect (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'XP (BrukerAXS, 2000)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.959
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'Nonius KappaCCD APEXII'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.073
_diffrn_reflns_av_sigmaI/netI    0.0477
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            45638
_diffrn_reflns_theta_full        66.79
_diffrn_reflns_theta_max         66.79
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    5.374
_exptl_absorpt_correction_T_max  0.7749
_exptl_absorpt_correction_T_min  0.5417
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Denzo (otwinowski, Borek, Majewski & Minor, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.560
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1808
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.626
_refine_diff_density_min         -0.524
_refine_diff_density_rms         0.082
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     433
_refine_ls_number_reflns         6529
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0656
_refine_ls_R_factor_gt           0.0465
_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^)+(0.0522P)^2^+3.2347P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1083
_refine_ls_wR_factor_ref         0.1189
_reflns_number_gt                4972
_reflns_number_total             6529
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol302855z_si_001.cif
_cod_data_source_block           stu6059
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               1508771