Enantioselective construction of sterically hindered tertiary alpha-aryl ketones: a catalytic asymmetric synthesis of isoflavanones
Michael Carrol; Helge Muller-Bunz; Patrick J. Guiry; Chem.Commun. 48 (2012) 11142–; doi:10.1039/c2cc36452b

data_7108563
_publ_section_title
;
 Enantioselective construction of sterically hindered tertiary alpha-aryl
 ketones: a catalytic asymmetric synthesis of isoflavanones
;
_journal_name_full               Chem.Commun.
_journal_page_first              11142
_journal_paper_doi               10.1039/c2cc36452b
_journal_volume                  48
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C18 H18 O5'
_chemical_formula_sum            'C18 H18 O5'
_chemical_formula_weight         314.32
_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                 99.843(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.2264(1)
_cell_length_b                   6.84999(9)
_cell_length_c                   12.2116(2)
_cell_measurement_reflns_used    5543
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      76.8889
_cell_measurement_theta_min      3.6706
_cell_volume                     760.422(18)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.36 (release 02-08-2010 CrysAlis171 .NET)
(compiled Aug 2 2010,13:00:58)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.36 (release 02-08-2010 CrysAlis171 .NET)
(compiled Aug 2 2010,13:00:58)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.36 (release 02-08-2010 CrysAlis171 .NET)
(compiled Aug 2 2010,13:00:58)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 10.3196
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'SuperNova (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0155
_diffrn_reflns_av_sigmaI/netI    0.0176
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            6757
_diffrn_reflns_theta_full        77.00
_diffrn_reflns_theta_max         77.09
_diffrn_reflns_theta_min         3.67
_exptl_absorpt_coefficient_mu    0.828
_exptl_absorpt_correction_T_max  0.941
_exptl_absorpt_correction_T_min  0.859
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.36 (release 02-08-2010 CrysAlis171 .NET)
(compiled Aug 2 2010,13:00:58)
Analytical numeric absorption correction using a multifaceted crystal
model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.373
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             332
_exptl_crystal_size_max          0.3109
_exptl_crystal_size_mid          0.1595
_exptl_crystal_size_min          0.1000
_refine_diff_density_max         0.199
_refine_diff_density_min         -0.192
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.06(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     211
_refine_ls_number_reflns         3111
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0302
_refine_ls_R_factor_gt           0.0292
_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^)+(0.0516P)^2^+0.0945P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0767
_refine_ls_wR_factor_ref         0.0785
_reflns_number_gt                3033
_reflns_number_total             3111
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c2cc36452b.txt
_cod_data_source_block           gui55(9c)
_cod_original_cell_volume        760.421(18)
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7108563