Investigation of oxidopyrylium-alkene [5+2] cycloaddition conjugate addition cascade (C^3^) sequences
Simanis, Justin A.; Law, C. Marshall; Woodall, Erica L.; Hamaker, Christopher G.; Goodell, John R.; Mitchell, T. Andrew; Chemical Communications (Cambridge, United Kingdom) 50 (2014) 9130–9133; doi:10.1039/c4cc04163a

data_7115425
_publ_section_title
;
 Investigation of oxidopyrylium-alkene [5+2] cycloaddition conjugate
 addition cascade (C^3^) sequences
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   65
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              9130
_journal_page_last               9133
_journal_paper_doi               10.1039/c4cc04163a
_journal_volume                  50
_journal_year                    2014
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C24 H22 O5'
_chemical_formula_sum            'C24 H22 O5'
_chemical_formula_weight         390.42
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2013-07-10T13:25:59-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 94.169(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.2563(4)
_cell_length_b                   12.5278(7)
_cell_length_c                   18.4201(10)
_cell_measurement_reflns_used    9220
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.7289
_cell_measurement_theta_min      2.2172
_cell_measurement_wavelength     0.71073
_cell_volume                     1900.21(17)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Giacovazzo et al, 1993)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0224
_diffrn_reflns_av_unetI/netI     0.0091
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            55053
_diffrn_reflns_theta_full        26.74
_diffrn_reflns_theta_max         26.74
_diffrn_reflns_theta_min         1.97
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.9859
_exptl_absorpt_correction_T_min  0.9761
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2012/1 (Bruker AXS Inc.)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.365
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.255
_exptl_crystal_size_mid          0.174
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.486
_refine_diff_density_min         -0.244
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         4036
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0433
_refine_ls_R_factor_gt           0.0407
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0519P)^2^+1.1890P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1062
_refine_ls_wR_factor_ref         0.1083
_reflns_number_gt                3767
_reflns_number_total             4036
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc04163a3.cif
_cod_data_source_block           ch104
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7115425