Asymmetric syntheses of 8-oxabicyclo[3,2,1]octane and 11-oxatricyclo[5.3.1.0]undecane from glycals
Liao, Hongze; Leng, Wei-Lin; Le Mai Hoang, Kim; Yao, Hui; He, Jingxi; Voo, Amanda Ying Hui; Liu, Xue-Wei; Chem. Sci.  (2017) –; doi:10.1039/C7SC02625K

data_1546766
_publ_section_title
;
 Asymmetric syntheses of 8-oxabicyclo[3,2,1]octane and
 11-oxatricyclo[5.3.1.0]undecane from glycals
;
_journal_name_full               'Chem. Sci.'
_journal_paper_doi               10.1039/C7SC02625K
_journal_year                    2017
_chemical_absolute_configuration unk
_chemical_formula_sum            'C22 H20 O4'
_chemical_formula_weight         348.38
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_update_record
;
2015-11-13 deposited with the CCDC.
2017-07-31 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.8597(6)
_cell_length_b                   8.4350(8)
_cell_length_c                   35.607(4)
_cell_measurement_reflns_used    4238
_cell_measurement_temperature    103.(2)
_cell_measurement_theta_max      22.7852
_cell_measurement_theta_min      2.9628
_cell_volume                     1759.9(3)
_computing_cell_refinement       'SAINT V8.32B (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'SAINT V8.32B (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      103.(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.976
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0420
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       42
_diffrn_reflns_limit_l_min       -42
_diffrn_reflns_number            12377
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         2.29
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.80
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2012/1 (Bruker AXS Inc.)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.315
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.280
_exptl_crystal_size_min          0.040
_refine_diff_density_max         0.194
_refine_diff_density_min         -0.212
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         3111
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.089
_refine_ls_R_factor_all          0.0555
_refine_ls_R_factor_gt           0.0467
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0376P)^2^+0.7934P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0946
_refine_ls_wR_factor_ref         0.0978
_reflns_number_gt                2754
_reflns_number_total             3111
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7sc02625k2.cif
_cod_data_source_block           I
_cod_database_code               1546766
_shelx_res_checksum              44952