Iodine-mediated regioselective 5-endo-dig electrophilic cyclization reaction of selenoenynes: synthesis of selenophene derivatives
Pistoia, Renan P.; Roehrs, Juliano A.; Back, Davi F.; Zeni, Gilson; Organic Chemistry Frontiers 4 (2017) 277–; doi:10.1039/C6QO00491A

data_1553555
_publ_section_title
;
 Iodine-mediated regioselective 5-endo-dig electrophilic cyclization
 reaction of selenoenynes: synthesis of selenophene derivatives
;
_journal_issue                   2
_journal_name_full               'Organic Chemistry Frontiers'
_journal_page_first              277
_journal_paper_doi               10.1039/C6QO00491A
_journal_volume                  4
_journal_year                    2017
_chemical_formula_moiety         'C20 H19 I O Se'
_chemical_formula_sum            'C20 H19 I O Se'
_chemical_formula_weight         481.21
_chemical_melting_point          361,6
_chemical_name_common            3-iodo-5-isopropoxy-2,4-diphenylselenophene
_chemical_name_systematic
;
        3-iodo-5-isopropoxy-2,4-diphenylselenophene
;
_space_group_IT_number           13
_space_group_name_Hall           '-P 2yc'
_space_group_name_H-M_alt        'P 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yc'
_symmetry_space_group_name_H-M   'P 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.3
_audit_creation_date             2016-04-11T09:47:39-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2016-08-24 deposited with the CCDC.
2016-11-29 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.1750(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   19.0809(7)
_cell_length_b                   5.7136(2)
_cell_length_c                   17.2112(6)
_cell_measurement_reflns_used    9883
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.61
_cell_measurement_theta_min      2.404
_cell_volume                     1846.87(11)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker Instrument Service v4.2.7'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'Diamond (version 3.2i; Crystal Impact G'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXL97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 10.4167
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 Venture Photon 100 diffractometer'
_diffrn_measurement_method       '2\% \f & \w scans'
_diffrn_radiation_monochromator  'Montel type 2-dim beam shaping X ray optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0259
_diffrn_reflns_av_unetI/netI     0.0393
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            15842
_diffrn_reflns_theta_full        29.63
_diffrn_reflns_theta_max         29.63
_diffrn_reflns_theta_min         2.4
_diffrn_source                   'micro-focus tube'
_exptl_absorpt_coefficient_mu    3.707
_exptl_absorpt_correction_T_max  0.5885
_exptl_absorpt_correction_T_min  0.3743
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS (version 2012/1; Bruker, 2012) was used to perform the numerical
        absorption correction based on the indexed faces of the crystal.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.731
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             936
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: MeOH/CH2Cl2'
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.718
_refine_diff_density_min         -0.682
_refine_diff_density_rms         0.089
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.07
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         5190
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.07
_refine_ls_R_factor_all          0.0243
_refine_ls_R_factor_gt           0.0207
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+0.8714P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0482
_refine_ls_wR_factor_ref         0.0495
_reflns_number_gt                4727
_reflns_number_total             5190
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6qo00491a2.cif
_cod_data_source_block           p2c
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'none' was changed to
'?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_Hall     -P2yc
_cod_original_sg_symbol_H-M      P2/c
_cod_database_code               1553555