Enantioselective 1,3-Dipolar Cycloaddition of C,N-Cyclic Azomethine Imines to Unsaturated Nitriles Catalyzed by NiII-Pigiphos
Sandra Milosevic; Antonio Togni; Journal of Organic Chemistry 78 (2013) 9638–9646; doi:10.1021/jo401247d

data_4028628
_publ_section_title
;
 Enantioselective 1,3-Dipolar Cycloaddition of C,N-Cyclic Azomethine
 Imines to Unsaturated Nitriles Catalyzed by NiII-Pigiphos
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              9638
_journal_page_last               9646
_journal_paper_doi               10.1021/jo401247d
_journal_volume                  78
_journal_year                    2013
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C19 H16 Br N3 O'
_chemical_formula_sum            'C19 H16 Br N3 O'
_chemical_formula_weight         382.26
_space_group_IT_number           170
_symmetry_cell_setting           hexagonal
_symmetry_Int_Tables_number      170
_symmetry_space_group_name_Hall  'P 65'
_symmetry_space_group_name_H-M   'P 65'
_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                120.00
_cell_formula_units_Z            6
_cell_length_a                   19.3207(8)
_cell_length_b                   19.3207(8)
_cell_length_c                   8.1719(5)
_cell_measurement_reflns_used    9481
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.29
_cell_measurement_theta_min      2.77
_cell_volume                     2641.8(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0467
_diffrn_reflns_av_sigmaI/netI    0.0426
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            40485
_diffrn_reflns_theta_full        30.48
_diffrn_reflns_theta_max         30.48
_diffrn_reflns_theta_min         2.11
_exptl_absorpt_coefficient_mu    2.344
_exptl_absorpt_correction_T_max  0.7977
_exptl_absorpt_correction_T_min  0.6100
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS-2004/1
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.442
_exptl_crystal_description       needle
_exptl_crystal_F_000             1164
_exptl_crystal_recrystallization_method methanol
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.10
_platon_squeeze_details
;
;
_refine_diff_density_max         0.449
_refine_diff_density_min         -0.432
_refine_diff_density_rms         0.059
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.012(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         5284
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0421
_refine_ls_R_factor_gt           0.0328
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0380P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0718
_refine_ls_wR_factor_ref         0.0742
_reflns_number_gt                4565
_reflns_number_total             5284
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo401247d_si_003.cif
_cod_data_source_block           sm99a
_cod_database_code               4028628