Expanding the Scope of Primary Amine Catalysis: Stereoselective Synthesis of Indanedione-Fused 2,6-Disubstituted trans-Spirocyclohexanones.
Madhusudhan Reddy, G.; Ko, Chi-Ting; Hsieh, Kai-Hong; Lee, Chia-Jui; Das, Utpal; Lin, Wenwei; The Journal of organic chemistry 81 (2016) 2420–2431; doi:10.1021/acs.joc.5b02921

data_4036608
_publ_section_title
;
 Expanding the Scope of Primary Amine Catalysis: Stereoselective Synthesis
 of Indanedione-Fused 2,6-Disubstituted trans-Spirocyclohexanones.
;
_journal_issue                   6
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              2420
_journal_page_last               2431
_journal_paper_doi               10.1021/acs.joc.5b02921
_journal_volume                  81
_journal_year                    2016
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C28 H23 Br O4'
_chemical_formula_sum            'C28 H23 Br O4'
_chemical_formula_weight         503.37
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_cell_setting           monoclinic
_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                 112.394(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.1259(2)
_cell_length_b                   21.6147(4)
_cell_length_c                   11.8647(3)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     2400.97(10)
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEX2'
_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  0.0419
_diffrn_reflns_av_sigmaI/netI    0.0812
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            16965
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    1.744
_exptl_absorpt_correction_T_max  0.8051
_exptl_absorpt_correction_T_min  0.5279
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.393
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.269
_refine_diff_density_min         -0.264
_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   0.016(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.959
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     595
_refine_ls_number_reflns         8005
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.959
_refine_ls_R_factor_all          0.0832
_refine_ls_R_factor_gt           0.0420
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0294P)^2^+0.1087P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0780
_refine_ls_wR_factor_ref         0.0920
_reflns_number_gt                5336
_reflns_number_total             8005
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo5b02921_si_004.cif
_cod_data_source_block           a17480
_cod_original_cell_volume        2400.97(9)
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4036608