Total Synthesis, Configuration Assignment, and Cytotoxic Activity Evaluation of Protulactone A.
Markovič, Martin; Koóš, Peter; Čarný, Tomáš; Sokoliová, Saskia; Boháčiková, Nikola; Moncol, Ján; Gracza, Tibor; Journal of natural products 80 (2017) 1631–1638; doi:10.1021/acs.jnatprod.7b00212

data_1546203
_publ_section_title
;
 Total Synthesis, Configuration Assignment, and Cytotoxic Activity
 Evaluation of Protulactone A.
;
_journal_issue                   5
_journal_name_full               'Journal of natural products'
_journal_page_first              1631
_journal_page_last               1638
_journal_paper_doi               10.1021/acs.jnatprod.7b00212
_journal_volume                  80
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C14 H26 O5 Si'
_chemical_formula_sum            'C14 H26 O5 Si'
_chemical_formula_weight         302.44
_chemical_name_systematic
3,6-anhydro-2,8-dideoxy-5-O-tert-butyldimethylsilyl-D-glycero-L-gluco-octano-1,4-lactone
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_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     dual
_audit_creation_date             2017-02-02
_audit_creation_method
;
Olex2 1.2
(compiled 2017.01.04 svn.r3372 for OlexSys, GUI svn.r5292)
;
_cell_angle_alpha                90
_cell_angle_beta                 97.466(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.9878(3)
_cell_length_b                   7.3276(2)
_cell_length_c                   18.7222(7)
_cell_measurement_reflns_used    38773
_cell_measurement_temperature    100
_cell_measurement_theta_max      71.67
_cell_measurement_theta_min      2.38
_cell_volume                     814.49(6)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100
_diffrn_detector                 Pilatus300K
_diffrn_detector_area_resol_mean 5.81
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'Stoe StadiVari'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_collimation    '0.6 mm diameter'
_diffrn_radiation_monochromator  'Graded multilayer mirror'
_diffrn_radiation_polarisn_norm  270
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54186
_diffrn_reflns_av_R_equivalents  0.0420
_diffrn_reflns_av_unetI/netI     0.0214
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.981
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            20874
_diffrn_reflns_point_group_measured_fraction_full 0.757
_diffrn_reflns_point_group_measured_fraction_max 0.730
_diffrn_reflns_theta_full        67.686
_diffrn_reflns_theta_max         71.793
_diffrn_reflns_theta_min         2.380
_diffrn_source                   'Genix3D Cu HF'
_diffrn_source_current           0.600
_diffrn_source_power             0.030
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    1.416
_exptl_absorpt_correction_T_max  0.681
_exptl_absorpt_correction_T_min  0.664
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   X-AREA
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.233
_exptl_crystal_description       needle
_exptl_crystal_F_000             328
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.395
_refine_diff_density_rms         0.062
_refine_ls_abs_structure_details
;
 Classical Flack method preferred over Parsons because s.u. lower.
;
_refine_ls_abs_structure_Flack   0.01(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.173
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     188
_refine_ls_number_reflns         2332
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.173
_refine_ls_R_factor_all          0.0366
_refine_ls_R_factor_gt           0.0314
_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^)+(0.0563P)^2^+0.2255P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0803
_refine_ls_wR_factor_ref         0.0958
_reflns_Friedel_coverage         0.373
_reflns_Friedel_fraction_full    0.471
_reflns_Friedel_fraction_max     0.433
_reflns_number_gt                2185
_reflns_number_total             2332
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np7b00212_si_002.cif
_cod_data_source_block           14
_cod_database_code               1546203
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.871
_shelx_estimated_absorpt_t_min   0.538
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C5(H5A,H5B)
2.c Idealised Me refined as rotating group:
 C8(H8A,H8B,H8C), C9(H9A,H9B,H9C), C10(H10A,H10B,H10C), C12(H12A,H12B,H12C),
 C13(H13A,H13B,H13C), C14(H14A,H14B,H14C)
2.d Idealised tetrahedral OH refined as rotating group:
 O5(H5)
;
_olex2_submission_special_instructions 'No special instructions were received'