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_4028344
_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         'C25 H32 Br N O4'
_chemical_formula_sum            'C25 H32 Br N O4'
_chemical_formula_weight         490.43
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                91.016(2)
_cell_angle_beta                 92.727(2)
_cell_angle_gamma                98.655(2)
_cell_formula_units_Z            2
_cell_length_a                   5.0201(2)
_cell_length_b                   14.0677(6)
_cell_length_c                   17.2224(8)
_cell_measurement_reflns_used    14533
_cell_measurement_temperature    150
_cell_measurement_theta_max      67.36
_cell_measurement_theta_min      2.57
_cell_volume                     1200.67(9)
_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 5.5
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker Smart 6000'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'Montel 200 optics'
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.030
_diffrn_reflns_av_sigmaI/netI    0.0251
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            18756
_diffrn_reflns_theta_full        67.73
_diffrn_reflns_theta_max         67.73
_diffrn_reflns_theta_min         2.57
_exptl_absorpt_coefficient_mu    2.575
_exptl_absorpt_correction_T_max  0.8792
_exptl_absorpt_correction_T_min  0.7521
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs (Sheldrick, 2008)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.357
_exptl_crystal_description       Chunk
_exptl_crystal_F_000             512
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.491
_refine_diff_density_min         -0.313
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     282
_refine_ls_number_reflns         4245
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0327
_refine_ls_R_factor_gt           0.0318
_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^)+(0.0517P)^2^+0.4482P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0853
_refine_ls_wR_factor_ref         0.0863
_reflns_number_gt                4073
_reflns_number_total             4245
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo400721e_si_005.cif
_cod_data_source_block           guin65
_cod_database_code               4028344