Pd-Catalyzed Spirocyclization via C-H Activation and Benzyne Insertion.
Yoon, Hyung; Lossouarn, Alexis; Landau, Felicitas; Lautens, Mark; Organic letters 18 (2016) 6324–6327; doi:10.1021/acs.orglett.6b03213

data_1555956
_publ_section_title
;
 Pd-Catalyzed Spirocyclization via C-H Activation and Benzyne Insertion.
;
_journal_issue                   24
_journal_name_full               'Organic letters'
_journal_page_first              6324
_journal_page_last               6327
_journal_paper_doi               10.1021/acs.orglett.6b03213
_journal_volume                  18
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C21 H16 O'
_chemical_formula_sum            'C21 H16 O'
_chemical_formula_weight         284.34
_space_group_crystal_system      orthorhombic
_space_group_IT_number           32
_space_group_name_Hall           'P 2 -2ab'
_space_group_name_H-M_alt        'P b a 2'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   18.9446(5)
_cell_length_b                   24.3426(6)
_cell_length_c                   6.2244(2)
_cell_measurement_reflns_used    9923
_cell_measurement_temperature    147(2)
_cell_measurement_theta_max      66.41
_cell_measurement_theta_min      2.96
_cell_volume                     2870.45(14)
_computing_cell_refinement       APEX2
_computing_data_collection       'APEX2 (Bruker, 2014)'
_computing_data_reduction        'SAINT (Bruker, 2014)'
_computing_molecular_graphics    'PLATON (Spek, 2009)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      147(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker Kappa APEX-DUO CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0484
_diffrn_reflns_av_unetI/netI     0.0243
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            52991
_diffrn_reflns_point_group_measured_fraction_full 0.988
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_theta_full        67.356
_diffrn_reflns_theta_max         67.356
_diffrn_reflns_theta_min         2.956
_diffrn_source                   'Bruker ImuS with multi-layer optics'
_exptl_absorpt_coefficient_mu    0.614
_exptl_absorpt_correction_T_max  0.7529
_exptl_absorpt_correction_T_min  0.6776
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_description       needle
_exptl_crystal_F_000             1200
_exptl_crystal_size_max          0.180
_exptl_crystal_size_mid          0.050
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.105
_refine_diff_density_min         -0.159
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details
; 
 Flack x determined using 1961 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.05(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     397
_refine_ls_number_reflns         5101
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0320
_refine_ls_R_factor_gt           0.0278
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0352P)^2^+0.3598P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0668
_refine_ls_wR_factor_ref         0.0693
_reflns_Friedel_coverage         0.807
_reflns_Friedel_fraction_full    0.981
_reflns_Friedel_fraction_max     0.980
_reflns_number_gt                4641
_reflns_number_total             5101
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol6b03213_si_003.cif
_cod_data_source_block           d1630_a
_cod_database_code               1555956
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.898
_shelx_estimated_absorpt_t_max   0.970
_shelx_res_checksum              57911
_shelx_hkl_checksum              16106