Broad-Spectrum Enantioselective Diels-Alder Catalysis by Chiral, Cationic Oxazaborolidines
Do Hyun Ryu; Thomas W. Lee; E. J. Corey; Journal of the American Chemical Society 124 (2002) 9992–9993; doi:10.1021/ja027468h

data_4115090
_publ_section_title
;
 Broad-Spectrum Enantioselective Diels-Alder Catalysis by Chiral, Cationic
 Oxazaborolidines
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9992
_journal_page_last               9993
_journal_paper_doi               10.1021/ja027468h
_journal_volume                  124
_journal_year                    2002
_chemical_formula_sum            'C10 H10 B F3 O2'
_chemical_formula_weight         229.99
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 107.403(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.9804(16)
_cell_length_b                   10.1025(16)
_cell_length_c                   10.7724(18)
_cell_measurement_temperature    193(2)
_cell_volume                     1036.4(3)
_computing_cell_refinement       'SMART (BRUKER, V5.054, 1998)'
_computing_data_collection       'ASTRO (BRUKER, V5.007, 1997)'
_computing_data_reduction        'SAINT (BRUKER, V6.01, 1999)'
_computing_molecular_graphics    'SHELXTL (BRUKER, 1998, V5.1)'
_computing_publication_material  'XCIF (Sheldrick and BRUKER, 1997, V5.1)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_method       '\w, 0.3 deg'
_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  0.0467
_diffrn_reflns_av_sigmaI/netI    0.0363
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            5336
_diffrn_reflns_theta_full        28.37
_diffrn_reflns_theta_max         28.37
_diffrn_reflns_theta_min         2.44
_diffrn_standards_decay_%        <1
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.134
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.474
_exptl_crystal_description       block
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.397
_refine_diff_density_min         -0.363
_refine_diff_density_rms         0.103
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     146
_refine_ls_number_reflns         2523
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0531
_refine_ls_R_factor_gt           0.0473
_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^)+(0.0836P)^2^+0.2021P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1361
_refine_ls_wR_factor_ref         0.1420
_reflns_number_gt                2158
_reflns_number_total             2523
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja027468h_s2.cif
_cod_data_source_block           ejc21t
_cod_database_code               4115090