Total synthesis of (±)-sacidumlignans D and A through Ueno-Stork radical cyclization reaction.
Zhang, Jian-Jian; Yan, Chang-Song; Peng, Yu; Luo, Zhen-Biao; Xu, Xiao-Bo; Wang, Ya-Wen; Organic & biomolecular chemistry 11 (2013) 2498–2513; doi:10.1039/c3ob00053b

data_7152844
_publ_section_title
;
 Total synthesis of (+-)-sacidumlignans D and A through Ueno-Stork radical
 cyclization reaction.
;
_journal_issue                   15
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2498
_journal_page_last               2513
_journal_paper_doi               10.1039/c3ob00053b
_journal_volume                  11
_journal_year                    2013
_chemical_formula_sum            'C22 H28 O7'
_chemical_formula_weight         404.44
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 95.229(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.701(9)
_cell_length_b                   13.483(10)
_cell_length_c                   24.743(18)
_cell_measurement_reflns_used    3758
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      22.59
_cell_measurement_theta_min      2.21
_cell_volume                     4220(5)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0406
_diffrn_reflns_av_sigmaI/netI    0.0375
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            14943
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.21
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9795
_exptl_absorpt_correction_T_min  0.9731
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.273
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1728
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.192
_refine_diff_density_min         -0.143
_refine_diff_density_rms         0.038
_refine_ls_extinction_coef       0.0021(5)
_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   1.100
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         3936
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.100
_refine_ls_R_factor_all          0.0822
_refine_ls_R_factor_gt           0.0499
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1482
_refine_ls_wR_factor_ref         0.1754
_reflns_number_gt                2621
_reflns_number_total             3936
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ob00053b.txt
_cod_data_source_block           c2c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7152844