K2CO3-Promoted Domino Reactions: Construction of Functionalized 2,3-Dihydrobenzofurans and Clofibrate Analogues
Qu-Bo Li; Fei-Ting Zhou; Zheng-Geng Liu; Xue-Feng Li; Wei-Dong Zhu; Jian-Wu Xie; Journal of Organic Chemistry 76 (2011) 7222–7228; doi:10.1021/jo2008675

data_4026536
_publ_section_title
;
 K2CO3-Promoted Domino Reactions: Construction of Functionalized
 2,3-Dihydrobenzofurans and Clofibrate Analogues
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              7222
_journal_page_last               7228
_journal_paper_doi               10.1021/jo2008675
_journal_volume                  76
_journal_year                    2011
_chemical_formula_moiety         'C22 H20 Br Cl O6'
_chemical_formula_sum            'C22 H20 Br Cl O6'
_chemical_formula_weight         495.74
_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                 111.652(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.7744(6)
_cell_length_b                   10.0072(4)
_cell_length_c                   14.5277(5)
_cell_measurement_reflns_used    3498
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.58
_cell_measurement_theta_min      2.46
_cell_volume                     2131.50(14)
_computing_cell_refinement       'SAINT (Bruker, 2006)'
_computing_data_collection       'APEXII (Bruker, 2006)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker APEXII'
_diffrn_measurement_method       '\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  0.0497
_diffrn_reflns_av_sigmaI/netI    0.0558
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            17622
_diffrn_reflns_theta_full        27.58
_diffrn_reflns_theta_max         27.58
_diffrn_reflns_theta_min         2.46
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    2.090
_exptl_absorpt_correction_T_max  .47
_exptl_absorpt_correction_T_min  .37
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.545
_exptl_crystal_description       prism
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          .50
_exptl_crystal_size_mid          .45
_exptl_crystal_size_min          .36
_refine_diff_density_max         0.697
_refine_diff_density_min         -0.598
_refine_diff_density_rms         0.060
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4844
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_gt           0.0483
_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^)+(0.0599P)^2^+1.0435P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1232
_refine_ls_wR_factor_ref         0.1413
_reflns_number_gt                2953
_reflns_number_total             4844
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo2008675_si_003.cif
_cod_data_source_block           a
_cod_database_code               4026536
_refine_ls_r_factor_ref          0.0902