Discovery of Oxygen α-Nucleophilic Addition to α,β-Unsaturated Amides Catalyzed by Redox-Neutral Organic Photoreductant.
Luan, Zi-Hong; Qu, Jian-Ping; Kang, Yan-Biao; Journal of the American Chemical Society 142 (2020) 20942–20947; doi:10.1021/jacs.0c10707

data_4135385
_publ_section_title
;
 Discovery of Oxygen \a-Nucleophilic Addition to \a,\b-Unsaturated Amides
 Catalyzed by Redox-Neutral Organic Photoreductant.
;
_journal_issue                   50
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              20942
_journal_page_last               20947
_journal_paper_doi               10.1021/jacs.0c10707
_journal_volume                  142
_journal_year                    2020
_chemical_formula_moiety         'C16 H16 Br N O2'
_chemical_formula_sum            'C16 H16 Br N O2'
_chemical_formula_weight         334.21
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2019-12-25
_audit_creation_method
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Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
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_cell_length_b                   12.58246(17)
_cell_length_c                   12.86856(16)
_cell_measurement_reflns_used    4304
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      72.9160
_cell_measurement_theta_min      3.4740
_cell_volume                     1494.21(3)
_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    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      291(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at home/near, AtlasS2'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0245
_diffrn_reflns_av_unetI/netI     0.0252
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.970
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            5762
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.970
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         73.026
_diffrn_reflns_theta_min         4.792
_exptl_absorpt_coefficient_mu    3.756
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.37460
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.40.53 (Rigaku Oxford Diffraction, 2019)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
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_exptl_crystal_description       block
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.613
_refine_diff_density_min         -0.478
_refine_diff_density_rms         0.085
_refine_ls_extinction_coef       0.0153(7)
_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   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     184
_refine_ls_number_reflns         2904
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0432
_refine_ls_R_factor_gt           0.0415
_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^)+(0.0737P)^2^+0.2861P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1115
_refine_ls_wR_factor_ref         0.1139
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2688
_reflns_number_total             2904
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c10707_si_002.cif
_cod_data_source_block           lzh-br
_cod_depositor_comments
'Adding full bibliography for 4135385--4135388.cif.'
_cod_database_code               4135385
_shelxl_version_number           2013-4
_shelx_estimated_absorpt_t_max   0.506
_shelx_estimated_absorpt_t_min   0.454
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 N1(H1), C5(H5), C14(H14), C4(H4), C12(H12), C10(H10), C11(H11), C2(H2),
 C13(H13), C3(H3)
2.b Idealised Me refined as rotating group:
 C16(H16A,H16B,H16C), C15(H15A,H15B,H15C)
;
_shelx_res_checksum              4362
_shelx_hkl_checksum              73957
_olex2_submission_special_instructions 'No special instructions were received'