Constructing Densely Functionalized Hajos–Parrish-type Ketones with Six Contiguous Stereogenic Centers and Two Quaternary Carbons in a Formal [2 + 2 + 2] Cycloaddition Cascade
Peng, Chieh-Hung; Hong, Bor-Cherng; Raja, Arun; Chang, Chun-Wei; Lee, Gene-Hsiang; RSC Adv.  (2016) –; doi:10.1039/C6RA22430J

data_7226655
_publ_section_title
;
 Constructing Densely Functionalized Hajos--Parrish-type Ketones with Six
 Contiguous Stereogenic Centers and Two Quaternary Carbons in a Formal [2
 + 2 + 2] Cycloaddition Cascade
;
_journal_name_full               'RSC Adv.'
_journal_paper_doi               10.1039/C6RA22430J
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_sum            'C22 H20 N4 O10'
_chemical_formula_weight         500.42
_chemical_name_common            'second crystal ic18028'
_chemical_name_systematic        3i
_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_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-09-23 deposited with the CCDC.
2016-09-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.3839(2)
_cell_length_b                   11.6090(2)
_cell_length_c                   19.7514(4)
_cell_measurement_reflns_used    9814
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      70.11
_cell_measurement_theta_min      3.81
_cell_volume                     2151.67(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX3'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker D8 VENTURE'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0174
_diffrn_reflns_av_unetI/netI     0.0156
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            12358
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         69.962
_diffrn_reflns_theta_min         4.418
_exptl_absorpt_coefficient_mu    1.064
_exptl_absorpt_correction_T_max  0.7533
_exptl_absorpt_correction_T_min  0.6145
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2016)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.545
_exptl_crystal_description       block
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.333
_exptl_crystal_size_mid          0.298
_exptl_crystal_size_min          0.157
_refine_diff_density_max         0.224
_refine_diff_density_min         -0.128
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details
; 
 Flack x determined using 1705 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.01(3)
_refine_ls_extinction_coef       0.0047(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         4066
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0245
_refine_ls_R_factor_gt           0.0240
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0321P)^2^+0.4379P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0617
_refine_ls_wR_factor_ref         0.0621
_reflns_Friedel_coverage         0.747
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                4015
_reflns_number_total             4066
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ra22430j2.cif
_cod_data_source_block           3i_second_crystal_ic18028
_cod_database_code               7226655
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.718
_shelx_estimated_absorpt_t_max   0.851
_shelx_res_checksum              89342