Asymmetric construction of spirocyclopentenebenzofuranone core structures via highly selective phosphine-catalyzed [3 + 2] cycloaddition reactions.
Albertshofer, Klaus; Tan, Bin; Barbas, 3rd, Carlos F; Organic letters 15 (2013) 2958–2961; doi:10.1021/ol401087a

data_1556161
_publ_section_title
;
 Asymmetric construction of spirocyclopentenebenzofuranone core structures
 via highly selective phosphine-catalyzed [3 + 2] cycloaddition reactions.
;
_journal_issue                   12
_journal_name_full               'Organic letters'
_journal_page_first              2958
_journal_page_last               2961
_journal_paper_doi               10.1021/ol401087a
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C12 H9 Cl O4'
_chemical_formula_weight         252.64
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_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                 111.154(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   9.5934(17)
_cell_length_b                   34.977(6)
_cell_length_c                   6.9856(13)
_cell_measurement_reflns_used    4083
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.80
_cell_measurement_theta_min      2.28
_cell_volume                     2186.1(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0642
_diffrn_reflns_av_sigmaI/netI    0.0600
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       43
_diffrn_reflns_limit_k_min       -43
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            20947
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.50
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    0.348
_exptl_absorpt_correction_T_max  0.9760
_exptl_absorpt_correction_T_min  0.9027
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.535
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.07
_refine_diff_density_max         1.607
_refine_diff_density_min         -0.492
_refine_diff_density_rms         0.085
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.103
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         4368
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.0966
_refine_ls_R_factor_gt           0.0689
_refine_ls_shift/su_max          0.020
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0320P)^2^+7.9000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1481
_refine_ls_wR_factor_ref         0.1589
_reflns_number_gt                3207
_reflns_number_total             4368
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol401087a_si_001.cif
_cod_data_source_block           barbas29
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1556161