Concise Substrate-Controlled Asymmetric Total Syntheses of Dioxabicyclic Marine Natural Products with 2,10-Dioxabicyclo-[7.3.0]dodecene and 2,9-Dioxabicyclo[6.3.0]undecene Skeletons
Mi Jung Kim; Te-ik Sohn; Deukjoon Kim; Robert S. Paton; Journal of the American Chemical Society 134 (2012) 20178–20188; doi:10.1021/ja310249u

data_4119011
_publ_section_title
;
 Concise Substrate-Controlled Asymmetric Total Syntheses of Dioxabicyclic
 Marine Natural Products with 2,10-Dioxabicyclo-[7.3.0]dodecene and
 2,9-Dioxabicyclo[6.3.0]undecene Skeletons
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              20178
_journal_page_last               20188
_journal_paper_doi               10.1021/ja310249u
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C15 H20 Br2 O2'
_chemical_formula_weight         392.13
_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                 104.071(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.1865(1)
_cell_length_b                   20.1756(3)
_cell_length_c                   7.4953(1)
_cell_measurement_reflns_used    6209
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      28.32
_cell_measurement_theta_min      2.80
_cell_volume                     760.78(2)
_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      100(1)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0283
_diffrn_reflns_av_sigmaI/netI    0.0460
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            7121
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         2.02
_exptl_absorpt_coefficient_mu    5.323
_exptl_absorpt_correction_T_max  0.5228
_exptl_absorpt_correction_T_min  0.2981
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            silver
_exptl_crystal_density_diffrn    1.712
_exptl_crystal_density_meas      ?
_exptl_crystal_description       block
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.377
_refine_diff_density_min         -0.367
_refine_diff_density_rms         0.066
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.043(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.939
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         3355
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.939
_refine_ls_R_factor_all          0.0201
_refine_ls_R_factor_gt           0.0194
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0447
_refine_ls_wR_factor_ref         0.0448
_reflns_number_gt                3258
_reflns_number_total             3355
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja310249u_si_006.cif
_cod_data_source_block           20120125lt_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_database_code               4119011