A Study of Exocyclic Radical Reductions of Polysubstituted Tetrahydropyrans
François Godin; Michel Prévost; Frédérick Viens; Philippe Mochirian; Jean-François Brazeau; Serge I. Gorelsky; Yvan Guindon; Journal of Organic Chemistry 78 (2013) 6075–6103; doi:10.1021/jo400721e

data_4028343
_publ_section_title
;
 A Study of Exocyclic Radical Reductions of Polysubstituted
 Tetrahydropyrans
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6075
_journal_page_last               6103
_journal_paper_doi               10.1021/jo400721e
_journal_volume                  78
_journal_year                    2013
_chemical_compound_source        'Synthesized by the authors. See text'
_chemical_formula_moiety         'C26 H34 Br N O4'
_chemical_formula_sum            'C26 H34 Br N O4'
_chemical_formula_weight         504.45
_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
_cell_angle_beta                 95.038(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.8103(8)
_cell_length_b                   5.1284(3)
_cell_length_c                   30.3621(17)
_cell_measurement_reflns_used    13622
_cell_measurement_temperature    150
_cell_measurement_theta_max      68.67
_cell_measurement_theta_min      2.92
_cell_volume                     2452.3(2)
_computing_cell_refinement       'SAINT V7.68A(Bruker AXS, 2009)'
_computing_data_collection       'APEX2  (Bruker AXS, 2009)'
_computing_data_reduction        'SAINT V7.68A(Bruker AXS, 2009)'
_computing_molecular_graphics    'SHELXTL v6.12 (Bruker AXS, 2001)'
_computing_publication_material  'UdMX (Maris, 2004)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker Microstar'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'Helios optics'
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.047
_diffrn_reflns_av_sigmaI/netI    0.0227
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            39723
_diffrn_reflns_theta_full        69.52
_diffrn_reflns_theta_max         69.52
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    2.536
_exptl_absorpt_correction_T_max  0.9505
_exptl_absorpt_correction_T_min  0.5889
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs (Sheldrick, 1996)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.366
_exptl_crystal_description       Needle
_exptl_crystal_F_000             1056
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.897
_refine_diff_density_min         -0.781
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     296
_refine_ls_number_reflns         4582
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0476
_refine_ls_R_factor_gt           0.0388
_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^)+(0.0673P)^2^+1.0044P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1069
_refine_ls_wR_factor_ref         0.1116
_reflns_number_gt                3772
_reflns_number_total             4582
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo400721e_si_004.cif
_cod_data_source_block           guin68
_cod_database_code               4028343