A short and elegant synthetic approach for 9-substituted tetrahydro coumestan derivatives and synthesis of some naturally occurring coumestan derivatives
Faraz, Simra; Khan, Abu Taleb; New Journal of Chemistry 48 (2024) 13514–13525; doi:10.1039/D4NJ02189D

data_7063335
_publ_section_title
;
 A short and elegant synthetic approach for 9-substituted tetrahydro
 coumestan derivatives and synthesis of some naturally occurring coumestan
 derivatives
;
_journal_issue                   30
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              13514
_journal_page_last               13525
_journal_paper_doi               10.1039/D4NJ02189D
_journal_volume                  48
_journal_year                    2024
_chemical_formula_moiety         'C19 H12 O3'
_chemical_formula_sum            'C19 H12 O3'
_chemical_formula_weight         288.29
_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'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2023-08-17
_audit_creation_method
;
Olex2 1.5
(compiled 2023.02.24 svn.rf166f9f3 for OlexSys, GUI svn.r6725)
;
_audit_update_record
;
2023-08-17 deposited with the CCDC.	2024-07-01 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.028(3)
_cell_length_b                   13.206(4)
_cell_length_c                   14.716(5)
_cell_measurement_reflns_used    9664
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      24.27
_cell_measurement_theta_min      2.77
_cell_volume                     1365.8(9)
_computing_cell_refinement       'SAINT V8.38A (Bruker, 2018)'
_computing_data_reduction        'SAINT V8.38A (Bruker, 2018)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      297.00
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0584
_diffrn_reflns_av_unetI/netI     0.0350
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            28563
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.455
_diffrn_reflns_theta_min         2.072
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.6907
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1701 before and 0.0659 after correction.
The Ratio of minimum to maximum transmission is 0.9266.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.402
_exptl_crystal_description       needle
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.163
_refine_diff_density_min         -0.155
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details
;
 Flack x determined using 721 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.3(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         2808
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0608
_refine_ls_R_factor_gt           0.0381
_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^)+(0.0502P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0809
_refine_ls_wR_factor_ref         0.0861
_reflns_Friedel_coverage         0.717
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.990
_reflns_number_gt                2041
_reflns_number_total             2808
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4nj02189d2.cif
_cod_data_source_block           sf_cho_0m_a
_cod_depositor_comments
'Adding full bibliography for 7063334--7063335.cif.'
_cod_original_cell_volume        1365.8(8)
_cod_database_code               7063335
_shelx_shelxl_version_number     2019/1
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C11(H11A,H11B), C12(H12A,H12B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C17(H17), C5(H5), C14(H14), C3(H3), C4(H4), C16(H16), C15(H15)
;
_shelx_res_checksum              47909
_olex2_submission_special_instructions 'No special instructions were received'