Synthesis of azulene-substituted benzofurans and isocoumarins via intramolecular cyclization of 1-ethynylazulenes, and their structural and optical properties.
Shoji, Taku; Tanaka, Miwa; Takagaki, Sho; Miura, Kota; Ohta, Akira; Sekiguchi, Ryuta; Ito, Shunji; Mori, Shigeki; Okujima, Tetsuo; Organic & biomolecular chemistry 16 (2018) 480–489; doi:10.1039/c7ob02861j

data_7156043
_publ_section_title
;
 Synthesis of azulene-substituted benzofurans and isocoumarins via
 intramolecular cyclization of 1-ethynylazulenes, and their structural and
 optical properties.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              480
_journal_page_last               489
_journal_paper_doi               10.1039/c7ob02861j
_journal_volume                  16
_journal_year                    2018
_chemical_formula_moiety         'C24 H19 I O4'
_chemical_formula_sum            'C24 H19 I O4'
_chemical_formula_weight         498.29
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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-2016/6
_audit_update_record
;
2017-04-18 deposited with the CCDC.
2017-12-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 103.877(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.5028(6)
_cell_length_b                   9.0127(3)
_cell_length_c                   17.7036(10)
_cell_measurement_reflns_used    12728
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.87
_cell_measurement_theta_min      2.35
_cell_volume                     1936.69(16)
_computing_cell_refinement       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_molecular_graphics    'CrystalStructure 4.2.4 (Rigaku, 2016)'
_computing_publication_material  'CrystalStructure 4.2.4'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 7.111
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Rigaku Saturn724'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.1044
_diffrn_reflns_av_unetI/netI     0.0666
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            32058
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.000
_diffrn_reflns_theta_min         2.370
_diffrn_source                   'Varimax 50 kV 24 mA Rotating anode'
_exptl_absorpt_coefficient_mu    1.683
_exptl_absorpt_correction_T_max  0.967
_exptl_absorpt_correction_T_min  0.825
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.41 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.709
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.030
_exptl_crystal_size_mid          0.020
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.811
_refine_diff_density_min         -0.619
_refine_diff_density_rms         0.138
_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     265
_refine_ls_number_reflns         4672
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0669
_refine_ls_R_factor_gt           0.0452
_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^)+(0.0240P)^2^+2.3963P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0762
_refine_ls_wR_factor_ref         0.0828
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3597
_reflns_number_total             4672
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ob02861j2.cif
_cod_data_source_block           shelxl_CCDC3
_cod_depositor_comments
'Adding full bibliography for 7156040--7156045.cif.'
_cod_database_code               7156043
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.951
_shelx_estimated_absorpt_t_max   0.967
_shelx_res_checksum              68155