Imidazolidinone intermediates in prolinamide-catalyzed aldol reactions.
Fuentes de Arriba, Angel L.; Simón, Luis; Raposo, César; Alcázar, Victoria; Sanz, Francisca; Muñiz, Francisco M; Morán, Joaquín R; Organic & biomolecular chemistry 8 (2010) 2979–2985; doi:10.1039/b926284a

data_7153321
_publ_section_title
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 Imidazolidinone intermediates in prolinamide-catalyzed aldol reactions.
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_journal_issue                   13
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2979
_journal_page_last               2985
_journal_paper_doi               10.1039/b926284a
_journal_volume                  8
_journal_year                    2010
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C18 H17 N3 O3'
_chemical_formula_sum            'C18 H17 N3 O3'
_chemical_formula_weight         323.35
_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                   6.6712(2)
_cell_length_b                   14.9403(4)
_cell_length_c                   15.7482(4)
_cell_measurement_temperature    273(2)
_cell_volume                     1569.62(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.963
_diffrn_measured_fraction_theta_max 0.964
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0219
_diffrn_reflns_av_sigmaI/netI    0.0192
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9894
_diffrn_reflns_theta_full        64.85
_diffrn_reflns_theta_max         64.85
_diffrn_reflns_theta_min         5.62
_exptl_absorpt_coefficient_mu    0.780
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.368
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.100
_refine_diff_density_min         -0.089
_refine_diff_density_rms         0.025
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(2)
_refine_ls_extinction_coef       0.0108(5)
_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   1.043
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     226
_refine_ls_number_reflns         2441
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0277
_refine_ls_R_factor_gt           0.0262
_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^)+(0.0401P)^2^+0.1560P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0695
_refine_ls_wR_factor_ref         0.0708
_reflns_number_gt                2337
_reflns_number_total             2441
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b926284a.txt
_cod_data_source_block           19r
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_Hall     P2ac2ab
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7153321