Solvent-Free DABCO-Mediated [3 + 2] Cycloadditions of Donor-Acceptor Cyclopropanes with Aldehydes: Strategy for Synthesis of Fully Substituted Furans.
Liu, Jiaming; Ye, Weijian; Qing, Xushun; Wang, Cunde; The Journal of organic chemistry 81 (2016) 7970–7976; doi:10.1021/acs.joc.6b01259

data_4037016
_publ_section_title
;
 Solvent-Free DABCO-Mediated [3 + 2] Cycloadditions of Donor-Acceptor
 Cyclopropanes with Aldehydes: Strategy for Synthesis of Fully Substituted
 Furans.
;
_journal_issue                   17
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              7970
_journal_page_last               7976
_journal_paper_doi               10.1021/acs.joc.6b01259
_journal_volume                  81
_journal_year                    2016
_chemical_formula_moiety         'C24 H15 Br2 N O2'
_chemical_formula_sum            'C24 H15 Br2 N O2'
_chemical_formula_weight         509.17
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                91.851(6)
_cell_angle_beta                 94.524(7)
_cell_angle_gamma                94.956(7)
_cell_formula_units_Z            2
_cell_length_a                   6.0958(13)
_cell_length_b                   8.9005(18)
_cell_length_c                   18.462(4)
_cell_measurement_reflns_used    2906
_cell_measurement_temperature    296
_cell_measurement_theta_max      22.25
_cell_measurement_theta_min      2.21
_cell_volume                     994.0(4)
_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  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      296
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.981
_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  0.0982
_diffrn_reflns_av_sigmaI/netI    0.1523
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_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            15128
_diffrn_reflns_theta_full        27.57
_diffrn_reflns_theta_max         27.57
_diffrn_reflns_theta_min         1.11
_exptl_absorpt_coefficient_mu    4.099
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.701
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.851
_refine_diff_density_min         -0.604
_refine_diff_density_rms         0.093
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.006
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         4508
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.1815
_refine_ls_R_factor_gt           0.0673
_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^)+(0.0551P)^2^+0.4765P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1134
_refine_ls_wR_factor_ref         0.1395
_reflns_number_gt                2193
_reflns_number_total             4597
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo6b01259_si_003.cif
_cod_data_source_block           001
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Triclinic' was changed to
'triclinic' 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      'P-1   '
_cod_database_code               4037016