Organocatalytic Asymmetric [4+2] Formal Cycloadditions of Cyclohexenylidenemalononitriles and Enals to Construct Chiral Bicyclo[2.2.2]octanes
Chen, Ying-Chun; Li, Qing-Zhu; Gu, Jing; RSC Advances  (2014) –; doi:10.1039/C4RA07709A

data_7217644
_publ_section_title
;
 Organocatalytic Asymmetric [4+2] Formal Cycloadditions of
 Cyclohexenylidenemalononitriles and Enals to Construct Chiral
 Bicyclo[2.2.2]octanes
;
_journal_name_full               'RSC Advances'
_journal_paper_doi               10.1039/C4RA07709A
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_sum            'C19 H19 Cl N2 O'
_chemical_formula_weight         326.81
_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                   7.2494(19)
_cell_length_b                   13.352(4)
_cell_length_c                   16.888(5)
_cell_measurement_reflns_used    6852
_cell_measurement_temperature    143(2)
_cell_measurement_theta_max      31.502
_cell_measurement_theta_min      2.412
_cell_volume                     1634.7(8)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      143(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  AFC10/Saturn724+
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0622
_diffrn_reflns_av_sigmaI/netI    0.0859
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            16028
_diffrn_reflns_theta_full        31.53
_diffrn_reflns_theta_max         31.53
_diffrn_reflns_theta_min         3.06
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.240
_exptl_absorpt_correction_T_max  0.8895
_exptl_absorpt_correction_T_min  0.8875
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.51
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.50
_refine_diff_density_max         0.283
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.10(8)
_refine_ls_extinction_coef       0.024(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         5405
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0652
_refine_ls_R_factor_gt           0.0579
_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^)+(0.0638P)^2^+0.1160P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1405
_refine_ls_wR_factor_ref         0.1455
_reflns_number_gt                4607
_reflns_number_total             5405
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ra07709a2.cif
_cod_data_source_block           4g
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scans' was replaced
with the value 'multi-scan' as specified in the replacement file
'src/cod-tools/trunk/data/replacement-values/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 5376 2017-05-30 11:51:03Z andrius 
;
_cod_original_cell_volume        1634.7(7)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7217644