Synthesis of 6H-Dibenzo[b,d]pyran-6-ones Using the Inverse Electron Demand Diels-Alder Reaction
Ian R. Pottie; Penchal Reddy Nandaluru; Wendy L. Benoit; David O. Miller; Louise N. Dawe; Graham J. Bodwell; Journal of Organic Chemistry 76 (2011) 9015–9030; doi:10.1021/jo201775e

data_4026721
_publ_contact_author_address
;
Department of chemistry
Memorial University of Newfoundland
St. Johns, NL, A1B 3X7, Canada
;
_publ_contact_author_email       gbodwell@mun.ca
_publ_contact_author_fax         1-709-864-3702
_publ_contact_author_name        'Graham J. Bodwell'
_publ_contact_author_phone       1-709-864-8406
_publ_section_title
;
 Synthesis of 6H-Dibenzo[b,d]pyran-6-ones Using the Inverse Electron
 Demand Diels-Alder Reaction
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              9015
_journal_page_last               9030
_journal_paper_doi               10.1021/jo201775e
_journal_volume                  76
_journal_year                    2011
_chemical_formula_moiety         'C19 H18 O4'
_chemical_formula_sum            'C19 H18 O4'
_chemical_formula_weight         310.33
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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                 97.932(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.8462(12)
_cell_length_b                   23.6535(9)
_cell_length_c                   8.3161(6)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    299(2)
_cell_measurement_theta_max      29.73
_cell_measurement_theta_min      29.035
_cell_volume                     1528.6(3)
_computing_cell_refinement       'MSC/AFC Diffractometer Control'
_computing_data_collection       'MSC/AFC Diffractometer Control (Rigaku, 1998)'
_computing_data_reduction        'MSC/AFC Diffractometer Control'
_computing_molecular_graphics    'CrystalStructure 4.0'
_computing_publication_material  'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL-97 (Acta Cryst.2008, A64, 112-122)'
_computing_structure_solution    'SIR92 (Altomare, et al., 1994)'
_diffrn_ambient_temperature      299(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Rigaku AFC6S'
_diffrn_measurement_method       \w-2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0441
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            2271
_diffrn_reflns_theta_full        60.07
_diffrn_reflns_theta_max         60.07
_diffrn_reflns_theta_min         3.74
_exptl_absorpt_coefficient_mu    0.770
_exptl_absorpt_correction_T_max  0.857
_exptl_absorpt_correction_T_min  0.822
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North, Phillips & Mathews, 1968)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.348
_exptl_crystal_description       irregular
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.208
_refine_diff_density_min         -0.229
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         2271
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.078
_refine_ls_R_factor_all          0.0831
_refine_ls_R_factor_gt           0.0410
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0637P)^2^+0.3515P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1122
_refine_ls_wR_factor_ref         0.1371
_reflns_number_gt                1535
_reflns_number_total             2271
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo201775e_si_003.cif
_cod_data_source_block           ip-2-38a
_cod_database_code               4026721