Metal-Free Borane-Catalyzed Highly Stereoselective Hydrogenation of Pyridines
Yongbing Liu; Haifeng Du; Journal of the American Chemical Society 135 (2013) 12968–12971; doi:10.1021/ja406761j

data_4120743
_publ_section_title
;
 Metal-Free Borane-Catalyzed Highly Stereoselective Hydrogenation of
 Pyridines
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12968
_journal_page_last               12971
_journal_paper_doi               10.1021/ja406761j
_journal_volume                  135
_journal_year                    2013
_chemical_formula_moiety         'C24 H32 N2'
_chemical_formula_sum            'C24 H32 N2'
_chemical_formula_weight         348.52
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 95.849(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.0673(13)
_cell_length_b                   6.0026(7)
_cell_length_c                   20.713(3)
_cell_measurement_reflns_used    3241
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.49
_cell_measurement_theta_min      1.98
_cell_volume                     997.8(2)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'Olex2 ver 1.1'
_computing_publication_material  'SHELX97 (Sheldrick, 2008)'
_computing_structure_refinement  'Olex2 ver 1.1'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0336
_diffrn_reflns_av_sigmaI/netI    0.0284
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            6635
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         3.54
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6110
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.160
_exptl_crystal_description       block
_exptl_crystal_F_000             380
_exptl_crystal_size_max          0.72
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.45
_refine_diff_density_max         0.334
_refine_diff_density_min         -0.185
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.133
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     119
_refine_ls_number_reflns         2246
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.133
_refine_ls_R_factor_all          0.0551
_refine_ls_R_factor_gt           0.0530
_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^)+(0.0611P)^2^+0.3035P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1359
_refine_ls_wR_factor_ref         0.1379
_reflns_number_gt                2164
_reflns_number_total             2246
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja406761j_si_003.cif
_cod_data_source_block           sa2684
_cod_database_code               4120743