Efficient entry to the [2.2.2]-diazabicyclic ring system via diastereoselective domino reaction sequence.
Margrey, Kaila A.; Chinn, Alex J.; Laws, Stephen W.; Pike, Robert D.; Scheerer, Jonathan R.; Organic letters 14 (2012) 2458–2461; doi:10.1021/ol3007056

data_1507670
_publ_section_title
;
 Efficient entry to the [2.2.2]-diazabicyclic ring system via
 diastereoselective domino reaction sequence.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2458
_journal_page_last               2461
_journal_paper_doi               10.1021/ol3007056
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C23 H22 N2 O4'
_chemical_formula_sum            'C23 H22 N2 O4'
_chemical_formula_weight         390.43
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.02190(10)
_cell_length_b                   13.9420(2)
_cell_length_c                   19.6816(3)
_cell_measurement_reflns_used    9075
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      68.12
_cell_measurement_theta_min      3.89
_cell_volume                     1926.82(5)
_computing_cell_refinement       'SAINTPLUS (Bruker AXS, 2004)'
_computing_data_collection       'APEX2 (Bruker AXS, 2004)'
_computing_data_reduction        SAINTPLUS
_computing_molecular_graphics    'ORTEP3 (Farrugia, 1997)'
_computing_publication_material  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_refinement  'XSHELL (Bruker, 2004)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART APEX II CCD'
_diffrn_measurement_method       '\w and \y'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0281
_diffrn_reflns_av_sigmaI/netI    0.0157
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            21116
_diffrn_reflns_theta_full        67.00
_diffrn_reflns_theta_max         67.00
_diffrn_reflns_theta_min         3.89
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.757
_exptl_absorpt_correction_T_max  0.8161
_exptl_absorpt_correction_T_min  0.7830
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2004)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.346
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.29
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.164
_refine_diff_density_min         -0.150
_refine_diff_density_rms         0.028
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.01(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     350
_refine_ls_number_reflns         3406
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0239
_refine_ls_R_factor_gt           0.0238
_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^)+(0.0440P)^2^+0.2302P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0643
_refine_ls_wR_factor_ref         0.0644
_reflns_number_gt                3386
_reflns_number_total             3406
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol3007056_si_003.cif
_cod_data_source_block           p212121
_cod_depositor_comments
'Adding full bibliography for 1507669--1507672.cif.'
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1507670