Nickel-mediated stereocontrolled synthesis of spiroketals via tandem cyclization-coupling of beta-bromo ketals and aryl iodides
Yu Peng; Xiao-Bo Xu; Jian Xiao; Ya-Wen Wang; Chem.Commun. 50 (2014) 472–; doi:10.1039/c3cc47780k

data_7110211
_publ_section_title
;
 Nickel-mediated stereocontrolled synthesis of spiroketals via tandem
 cyclization-coupling of beta-bromo ketals and aryl iodides
;
_journal_name_full               Chem.Commun.
_journal_page_first              472
_journal_paper_doi               10.1039/c3cc47780k
_journal_volume                  50
_journal_year                    2014
_chemical_formula_sum            'C16 H20 I2 O2'
_chemical_formula_weight         498.12
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 96.020(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   8.616(4)
_cell_length_b                   22.680(12)
_cell_length_c                   18.209(9)
_cell_measurement_reflns_used    3085
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      23.06
_cell_measurement_theta_min      2.42
_cell_volume                     3539(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0473
_diffrn_reflns_av_sigmaI/netI    0.0723
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            13784
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.12
_exptl_absorpt_coefficient_mu    3.554
_exptl_absorpt_correction_T_max  0.5516
_exptl_absorpt_correction_T_min  0.4953
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.870
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       stick
_exptl_crystal_F_000             1904
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.716
_refine_diff_density_min         -0.871
_refine_diff_density_rms         0.113
_refine_ls_extinction_coef       0.00319(10)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     362
_refine_ls_number_reflns         6458
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0776
_refine_ls_R_factor_gt           0.0423
_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^)+(0.0227P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0718
_refine_ls_wR_factor_ref         0.0830
_reflns_number_gt                4240
_reflns_number_total             6458
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc47780k.txt
_cod_data_source_block           p21c
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7110211