Connective Synthesis of 5,5-Disubstituted Hydantoins by Tandem α-Amination and α-Arylation of Silyl Ketene Acetals
Saunthwal, Rakesh; Cornall, Matthew; Abrams, Roman; Ward, John; Clayden, Jonathan; Chemical Science  (2019) –; doi:10.1039/C8SC05263H

data_1550570
_publ_section_title
;
 Connective Synthesis of 5,5-Disubstituted Hydantoins by Tandem
 \a-Amination and \a-Arylation of Silyl Ketene Acetals
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C8SC05263H
_journal_year                    2019
_chemical_formula_moiety         'C21 H24 N4 O3'
_chemical_formula_sum            'C21 H24 N4 O3'
_chemical_formula_weight         380.44
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2018-05-31
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2018-09-12 deposited with the CCDC.
2019-02-04 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.056(2)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   22.4783(5)
_cell_length_b                   11.4618(2)
_cell_length_c                   15.6035(4)
_cell_measurement_reflns_used    4349
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.82
_cell_measurement_theta_min      2.37
_cell_volume                     4017.53(15)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_collection       'Bruker Apex suite'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'Bruker area detector'
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'Bruker Apex II kappa CCD area detector'
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0360
_diffrn_reflns_av_unetI/netI     0.0346
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            17959
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.949
_diffrn_reflns_theta_min         1.995
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6264
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.0590 before and 0.0430 after correction. The Ratio of minimum to maximum transmission is 0.8401. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.258
_exptl_crystal_description       block
_exptl_crystal_F_000             1616
_exptl_crystal_size_max          0.561
_exptl_crystal_size_mid          0.292
_exptl_crystal_size_min          0.275
_refine_diff_density_max         0.345
_refine_diff_density_min         -0.285
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         4827
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0619
_refine_ls_R_factor_gt           0.0430
_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^)+(0.0508P)^2^+3.2786P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1030
_refine_ls_wR_factor_ref         0.1129
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3669
_reflns_number_total             4827
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8sc05263h2.cif
_cod_data_source_block           testm1
_cod_database_code               1550570
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_max   0.977
_shelx_estimated_absorpt_t_min   0.953
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C4(H4), C5(H5), C16(H16), C17(H17), C19(H19), C20(H20)
2.b Idealised Me refined as rotating group:
 C7(H7A,H7B,H7C), C11(H11A,H11B,H11C), C12(H12A,H12B,H12C), C14(H14A,H14B,
 H14C), C21(H21A,H21B,H21C)
;
_shelx_res_checksum              35152
_olex2_submission_special_instructions 'No special instructions were received'