Benzofurans as Efficient Dienophiles in Normal Electron Demand [4 + 2] Cycloadditions
Nathalie Chopin; Hélène Gérard; Isabelle Chataigner; Serge R. Piettre; Journal of Organic Chemistry 74 (2009) 1237–1246; doi:10.1021/jo802205d

data_4024285
_publ_section_title
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Benzofurans as Efficient Dienophiles in Normal Electron Demand [4 + 2]
Cycloadditions
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1237
_journal_page_last               1246
_journal_paper_doi               10.1021/jo802205d
_journal_volume                  74
_journal_year                    2009
_chemical_formula_moiety         'C19 H23 N O5'
_chemical_formula_sum            'C19 H23 N O5'
_chemical_formula_weight         345.38
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.3707(9)
_cell_length_b                   11.5748(9)
_cell_length_c                   25.612(2)
_cell_measurement_temperature    296(2)
_cell_volume                     3667.3(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0235
_diffrn_reflns_av_sigmaI/netI    0.0152
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            27486
_diffrn_reflns_theta_full        26.40
_diffrn_reflns_theta_max         26.40
_diffrn_reflns_theta_min         2.29
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.964
_exptl_absorpt_correction_T_min  0.84
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.251
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       PRISM
_exptl_crystal_F_000             1472
_exptl_crystal_size_max          0.90
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.537
_refine_diff_density_min         -0.262
_refine_diff_density_rms         0.050
_refine_ls_extinction_coef       0.0063(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     278
_refine_ls_number_reflns         3757
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0593
_refine_ls_R_factor_gt           0.0516
_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^)+(0.0847P)^2^+1.0051P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1492
_refine_ls_wR_factor_ref         0.1569
_reflns_number_gt                3146
_reflns_number_total             3757
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo802205d_si_001.cif
_cod_data_source_block           nc139_1t
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Empirical' changed to
'empirical' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_Hall     -P2ac2ab
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               4024285