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_4036606
_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         'C29 H25 Br O4'
_chemical_formula_sum            'C29 H25 Br O4'
_chemical_formula_weight         517.40
_space_group_IT_number           1
_space_group_name_Hall           'P 1'
_space_group_name_H-M_alt        'P 1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                98.62
_cell_angle_beta                 107.12
_cell_angle_gamma                93.00
_cell_formula_units_Z            2
_cell_length_a                   8.444
_cell_length_b                   11.055
_cell_length_c                   13.733
_cell_measurement_reflns_used    0
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     1204.984
_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 0.988
_diffrn_measured_fraction_theta_max 0.988
_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  0.0374
_diffrn_reflns_av_sigmaI/netI    0.0830
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            10163
_diffrn_reflns_theta_full        25.17
_diffrn_reflns_theta_max         25.17
_diffrn_reflns_theta_min         1.58
_exptl_absorpt_coefficient_mu    1.739
_exptl_absorpt_correction_T_max  0.4372
_exptl_absorpt_correction_T_min  0.3403
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.426
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.79
_exptl_crystal_size_mid          0.75
_exptl_crystal_size_min          0.57
_refine_diff_density_max         0.446
_refine_diff_density_min         -0.638
_refine_diff_density_rms         0.090
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.058(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.076
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     613
_refine_ls_number_reflns         6442
_refine_ls_number_restraints     54
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0487
_refine_ls_R_factor_gt           0.0392
_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^)+(0.0481P)^2^+0.1991P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0904
_refine_ls_wR_factor_ref         0.1143
_reflns_number_gt                5457
_reflns_number_total             6442
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo5b02921_si_005.cif
_cod_data_source_block           ch17522
_cod_original_cell_volume        1204.9
_cod_database_code               4036606