Total synthesis of polygalolide A.
Adachi, Masaatsu; Yamada, Hitomi; Isobe, Minoru; Nishikawa, Toshio; Organic letters 13 (2011) 6532–6535; doi:10.1021/ol2028256

data_1502610
_publ_section_title
;
 Total synthesis of polygalolide A.
;
_journal_issue                   24
_journal_name_full               'Organic letters'
_journal_page_first              6532
_journal_page_last               6535
_journal_paper_doi               10.1021/ol2028256
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_sum            'C28 H38 O5 Si2'
_chemical_formula_weight         510.76
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 108.832(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.4488(9)
_cell_length_b                   12.1633(8)
_cell_length_c                   18.4592(13)
_cell_measurement_reflns_used    4957
_cell_measurement_temperature    93
_cell_measurement_theta_max      32.30
_cell_measurement_theta_min      2.33
_cell_volume                     2857.9(3)
_computing_cell_refinement       'Bruker APEX2 (Bruker AXS, 2010)'
_computing_data_collection       'Bruker APEX2 (Bruker AXS, 2010)'
_computing_data_reduction        'Bruker SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'Brukre SHELXTL (Bruker AXS,2008)'
_computing_publication_material  'Bruker XCIF (Bruker AXS, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      93
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  'Bruker Helios multilayer confocal mirror'
_diffrn_radiation_source         'Bruker TXS fine-focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0306
_diffrn_reflns_av_sigmaI/netI    0.0757
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            34851
_diffrn_reflns_theta_full        35.97
_diffrn_reflns_theta_max         35.97
_diffrn_reflns_theta_min         1.60
_exptl_absorpt_coefficient_mu    0.158
_exptl_absorpt_correction_T_max  0.9844
_exptl_absorpt_correction_T_min  0.9813
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
SADABS Sheldrick 1996
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.187
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1096
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.366
_refine_diff_density_min         -0.297
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.998
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     631
_refine_ls_number_reflns         24368
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.998
_refine_ls_R_factor_all          0.0904
_refine_ls_R_factor_gt           0.0529
_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^)+(0.0470P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1072
_refine_ls_wR_factor_ref         0.1254
_reflns_number_gt                16507
_reflns_number_total             24368
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol2028256_si_002.cif
_cod_data_source_block           ad1
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P2(1)   '
_cod_database_code               1502610