Synthesis of Dibenzofurans via Palladium-Catalyzed Phenol-Directed C-H Activation/C-O Cyclization
Bin Xiao; Tian-Jun Gong; Zhao-Jing Liu; Jing-Hui Liu; Dong-Fen Luo; Jun Xu; Lei Liu; Journal of the American Chemical Society 133 (2011) 9250–9253; doi:10.1021/ja203335u

data_4106308
_publ_section_title
;
 Synthesis of Dibenzofurans via Palladium-Catalyzed Phenol-Directed C-H
 Activation/C-O Cyclization
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9250
_journal_page_last               9253
_journal_paper_doi               10.1021/ja203335u
_journal_volume                  133
_journal_year                    2011
_chemical_absolute_configuration unk
_chemical_formula_sum            'C26 H26 O4'
_chemical_formula_weight         402.47
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.9858(3)
_cell_length_b                   13.2211(6)
_cell_length_c                   22.1961(9)
_cell_measurement_reflns_used    3419
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      69.4904
_cell_measurement_theta_min      3.3405
_cell_volume                     2050.03(15)
_computing_cell_refinement       'CrysAlisPro (Oxford Diffraction Ltd.)'
_computing_data_collection       'CrysAlisPro (Oxford Diffraction Ltd.)'
_computing_data_reduction        'CrysAlisPro (Oxford Diffraction Ltd.)'
_computing_molecular_graphics
;
 OLEX2: a complete structure solution, refinement and analysis program.
 Dolomanov et al., J. Appl. Cryst. (2009). 42, 339-341
;
_computing_publication_material
;
 OLEX2: a complete structure solution, refinement and analysis program.
 Dolomanov et al., J. Appl. Cryst. (2009). 42, 339-341
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      291(2)
_diffrn_detector_area_resol_mean 15.9149
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Gemini S Ultra, Oxford Diffraction'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0228
_diffrn_reflns_av_sigmaI/netI    0.0303
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            8304
_diffrn_reflns_theta_full        65.09
_diffrn_reflns_theta_max         65.09
_diffrn_reflns_theta_min         3.89
_exptl_absorpt_coefficient_mu    0.697
_exptl_absorpt_correction_T_max  0.8182
_exptl_absorpt_correction_T_min  0.7876
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 CrysAlisPro, Oxford Diffraction Ltd.,
 Version 1.171.34.44 (release 25-10-2010 CrysAlis171 .NET)
 (compiled Oct 25 2010,18:11:34)
 empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_density_diffrn    1.304
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.317
_refine_diff_density_min         -0.116
_refine_diff_density_rms         0.031
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         3442
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0568
_refine_ls_R_factor_gt           0.0455
_refine_ls_shift/su_max          0.014
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
calc w=1/[\s^2^(Fo^2^)+(0.0713P)^2^+0.1217P] where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1199
_refine_ls_wR_factor_ref         0.1302
_reflns_number_gt                2829
_reflns_number_total             3442
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja203335u_si_002.cif
_cod_data_source_block           110317
_cod_database_code               4106308