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_4111946
_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         'C22 H24 O7'
_chemical_formula_sum            'C22 H24 O7'
_chemical_formula_weight         400.41
_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                 102.652(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.8495(9)
_cell_length_b                   33.138(4)
_cell_length_c                   7.8963(9)
_cell_measurement_reflns_used    2296
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      25.84
_cell_measurement_theta_min      2.46
_cell_volume                     2004.1(4)
_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 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0827
_diffrn_reflns_av_sigmaI/netI    0.0740
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       41
_diffrn_reflns_limit_k_min       -41
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            14816
_diffrn_reflns_theta_full        26.50
_diffrn_reflns_theta_max         26.50
_diffrn_reflns_theta_min         1.23
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.9931
_exptl_absorpt_correction_T_min  0.9606
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.327
_exptl_crystal_description       plate
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.207
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.995
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         4122
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.995
_refine_ls_R_factor_all          0.1168
_refine_ls_R_factor_gt           0.0514
_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^)+(0.0529P)^2^+0.3500P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1051
_refine_ls_wR_factor_ref         0.1322
_reflns_number_gt                2302
_reflns_number_total             4122
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja054171lsi20050624_123011.cif
_cod_data_source_block           3,4-epi-1
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4111946