Intramolecular Hydrogen Bond Activation: Thiourea-Organocatalyzed Enantioselective 1,3-Dipolar Cycloaddition of Salicylaldehyde-Derived Azomethine Ylides with Nitroalkenes.
Esteban, Francisco; Cieślik, Wioleta; Arpa, Enrique M.; Guerrero-Corella, Andrea; Díaz-Tendero, Sergio; Perles, Josefina; Fernández-Salas, José A; Fraile, Alberto; Alemán, José; ACS catalysis 8 (2018) 1884–1890; doi:10.1021/acscatal.7b03553

data_4514383
_publ_section_title
;
 Intramolecular Hydrogen Bond Activation: Thiourea-Organocatalyzed
 Enantioselective 1,3-Dipolar Cycloaddition of Salicylaldehyde-Derived
 Azomethine Ylides with Nitroalkenes.
;
_journal_issue                   3
_journal_name_full               'ACS catalysis'
_journal_page_first              1884
_journal_page_last               1890
_journal_paper_doi               10.1021/acscatal.7b03553
_journal_volume                  8
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_sum            'C18 H17 Br N2 O5'
_chemical_formula_weight         421.24
_chemical_name_common            FE01059
_space_group_crystal_system      orthorhombic
_space_group_IT_number           18
_space_group_name_Hall           'P 2 2ab'
_space_group_name_H-M_alt        'P 21 21 2'
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_atom_sites_solution_hydrogens   mixed
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.9676(3)
_cell_length_b                   23.8405(5)
_cell_length_c                   5.51660(10)
_cell_measurement_reflns_used    5626
_cell_measurement_temperature    296.(2)
_cell_measurement_theta_max      22.0420
_cell_measurement_theta_min      2.9167
_cell_volume                     1837.00(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      296.(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Kappa Apex II'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0588
_diffrn_reflns_av_unetI/netI     0.0368
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            31759
_diffrn_reflns_theta_full        25.34
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         1.69
_exptl_absorpt_coefficient_mu    2.269
_exptl_absorpt_correction_T_max  0.97
_exptl_absorpt_correction_T_min  0.83
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_density_diffrn    1.523
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.230
_exptl_crystal_size_mid          0.025
_exptl_crystal_size_min          0.015
_refine_diff_density_max         0.309
_refine_diff_density_min         -0.286
_refine_ls_abs_structure_details
;

Flack x determined using 877 quotients [(I+)-(I-)]/[(I+)+(I-)]
(Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.014(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         3374
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0591
_refine_ls_R_factor_gt           0.0341
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0568P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0862
_refine_ls_wR_factor_ref         0.0955
_reflns_number_gt                2544
_reflns_number_total             3374
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cs7b03553_si_004.cif
_cod_data_source_block           01893FranciscoEsteban
_cod_depositor_comments
'Adding full bibliography for 4514381--4514383.cif.'
_cod_database_code               4514383
_shelx_res_checksum              60666
_shelx_hkl_checksum              7972