Brønsted Acid-Catalyzed Allylboration: Short and Stereodivergent Synthesis of All Four Eupomatilone Diastereomers with Crystallographic Assignments
Siu Hong Yu; Michael J. Ferguson; Robert McDonald; Dennis G. Hall; Journal of the American Chemical Society 127 (2005) 12808–12809; doi:10.1021/ja054171l

data_4111944
_publ_contact_author_address
; Department of Chemistry
  University of Alberta
  Edmonton, Alberta T6G 2G2
  Canada
;
_publ_contact_author_email       dennis.hall@ualberta.ca
_publ_contact_author_fax         1(780)4928231
_publ_contact_author_name        'Dr. Dennis G. Hall'
_publ_contact_author_phone       1(780)4923141
_publ_section_title
;
 Br\/onsted Acid-Catalyzed Allylboration: Short and Stereodivergent
 Synthesis of All Four Eupomatilone Diastereomers with Crystallographic
 Assignments
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12808
_journal_page_last               12809
_journal_paper_doi               10.1021/ja054171l
_journal_volume                  127
_journal_year                    2005
_chemical_formula_moiety         'C15 H19 Br O5'
_chemical_formula_sum            'C15 H19 Br O5'
_chemical_formula_weight         359.21
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'manual editing of SHELXL template'
_cell_angle_alpha                90.00
_cell_angle_beta                 99.8561(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.9639(3)
_cell_length_b                   23.3702(8)
_cell_length_c                   8.5236(3)
_cell_measurement_reflns_used    7661
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      26.37
_cell_measurement_theta_min      2.58
_cell_volume                     1562.98(10)
_computing_cell_refinement       'Bruker SAINT (Bruker, 1997)'
_computing_data_collection       'Bruker SMART (Bruker, 1997)'
_computing_data_reduction        'Bruker SAINT (Bruker, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL (Bruker, 1997)'
_computing_publication_material  'Bruker SHELXTL (Bruker, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type
'Bruker PLATFORM diffractometer/SMART 1000 CCD area detector'
_diffrn_measurement_method       '\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  0.0223
_diffrn_reflns_av_sigmaI/netI    0.0197
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            11429
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         1.74
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.648
_exptl_absorpt_correction_T_max  0.5690
_exptl_absorpt_correction_T_min  0.4327
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.527
_exptl_crystal_description       prism
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.470
_refine_diff_density_min         -0.339
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         3190
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0301
_refine_ls_R_factor_gt           0.0252
_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^)+(0.0386P)^2^+0.5019P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0656
_refine_ls_wR_factor_ref         0.0677
_reflns_number_gt                2830
_reflns_number_total             3190
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja054171lsi20050624_122944.cif
_cod_data_source_block           10
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4111944