Pd-Catalyzed asymmetric decarboxylative cycloaddition of vinylethylene carbonates with 3-cyanochromones.
Khan, Ijaz; Zhao, Can; Zhang, Yong Jian; Chemical communications (Cambridge, England) 54 (2018) 4708–4711; doi:10.1039/c8cc02456a

data_7121524
_publ_section_title
;
 Pd-Catalyzed asymmetric decarboxylative cycloaddition of vinylethylene
 carbonates with 3-cyanochromones.
;
_journal_issue                   37
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4708
_journal_page_last               4711
_journal_paper_doi               10.1039/c8cc02456a
_journal_volume                  54
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_moiety         ' C20 H14 N2 O5'
_chemical_formula_sum            'C20 H14 N2 O5'
_chemical_formula_weight         362.33
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-01-05 deposited with the CCDC.
2018-04-16 downloaded from the CCDC.
;
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_cell_angle_gamma                90
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_cell_length_c                   17.8105(7)
_cell_measurement_reflns_used    9877
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_cell_volume                     1686.44(12)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
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_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
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_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0257
_diffrn_reflns_av_unetI/netI     0.0157
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
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_diffrn_reflns_limit_l_min       -21
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_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
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_diffrn_reflns_theta_max         66.760
_diffrn_reflns_theta_min         3.972
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.871
_exptl_absorpt_correction_type   none
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_exptl_crystal_description       block
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_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   -0.08(17)
_refine_ls_extinction_coef       0.0071(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.076
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
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_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.0240
_refine_ls_R_factor_gt           0.0231
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0378P)^2^+0.1459P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0617
_refine_ls_wR_factor_ref         0.0625
_reflns_Friedel_coverage         0.719
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                2898
_reflns_number_total             2973
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8cc02456a2.cif
_cod_data_source_block           a
_cod_depositor_comments
'Adding full bibliography for 7121524--7121526.cif.'
_cod_original_formula_sum        ' C20 H14 N2 O5'
_cod_database_code               7121524
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              20608