N,N'-Diarylureas: A New Family of Atropisomers Exhibiting Highly Diastereoselective Reactivity
Jonathan Clayden; Hazel Turner; Madeleine Helliwell; Elizabeth Moir; Journal of Organic Chemistry 73 (2008) 4415–4423; doi:10.1021/jo702706c

data_4023458
_publ_section_title
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 N,N'-Diarylureas: A New Family of Atropisomers Exhibiting
 Highly Diastereoselective Reactivity
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              4415
_journal_page_last               4423
_journal_paper_doi               10.1021/jo702706c
_journal_volume                  73
_journal_year                    2008
_chemical_formula_sum            'C25 H28 N2 O2'
_chemical_formula_weight         388.49
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_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                77.403(3)
_cell_angle_beta                 87.150(4)
_cell_angle_gamma                89.897(4)
_cell_formula_units_Z            4
_cell_length_a                   9.656(2)
_cell_length_b                   11.371(2)
_cell_length_c                   19.785(4)
_cell_measurement_reflns_used    4508
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.35
_cell_measurement_theta_min      2.31
_cell_volume                     2117.4(8)
_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      100(2)
_diffrn_measured_fraction_theta_full 0.971
_diffrn_measured_fraction_theta_max 0.971
_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           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0466
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            10391
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9624
_exptl_absorpt_correction_T_min  0.9337
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.219
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             832
_exptl_crystal_size_max          0.90
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.50
_refine_diff_density_max         0.903
_refine_diff_density_min         -0.375
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     541
_refine_ls_number_reflns         10391
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0746
_refine_ls_R_factor_gt           0.0646
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0595P)^2^+3.6776P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1642
_refine_ls_wR_factor_ref         0.1702
_reflns_number_gt                8684
_reflns_number_total             10391
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo702706c-File004.cif
_cod_data_source_block           hklf5
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
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_cod_database_code               4023458