Visible-light-induced C(sp3)–H activation for a C–C bond forming reaction of 3,4-dihydroquinoxalin-2(1H)-one with nucleophiles using oxygen with a photoredox catalyst or under catalyst-free conditions
Akula, Pavan Sudheer; Hong, Bor-Cherng; Lee, Gene-Hsiang; RSC Advances 8 (2018) 19580–; doi:10.1039/C8RA03259A

data_7230800
_publ_section_title
;
 Visible-light-induced C(sp3)--H activation for a C--C bond forming
 reaction of 3,4-dihydroquinoxalin-2(1H)-one with nucleophiles using
 oxygen with a photoredox catalyst or under catalyst-free conditions
;
_journal_issue                   35
_journal_name_full               'RSC Advances'
_journal_page_first              19580
_journal_paper_doi               10.1039/C8RA03259A
_journal_volume                  8
_journal_year                    2018
_chemical_formula_sum            'C23 H18 Br N3 O'
_chemical_formula_weight         432.31
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-01-15 deposited with the CCDC.
2018-05-15 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   19.2070(5)
_cell_length_b                   10.1247(3)
_cell_length_c                   19.7884(5)
_cell_measurement_reflns_used    9671
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      70.05
_cell_measurement_theta_min      4.37
_cell_volume                     3848.15(18)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX3'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker D8 VENTURE'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0169
_diffrn_reflns_av_unetI/netI     0.0108
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            22356
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         69.962
_diffrn_reflns_theta_min         4.604
_exptl_absorpt_coefficient_mu    3.057
_exptl_absorpt_correction_T_max  0.7533
_exptl_absorpt_correction_T_min  0.5463
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2016)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.492
_exptl_crystal_description       plate
_exptl_crystal_F_000             1760
_exptl_crystal_size_max          0.271
_exptl_crystal_size_mid          0.244
_exptl_crystal_size_min          0.113
_refine_diff_density_max         1.095
_refine_diff_density_min         -1.036
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     261
_refine_ls_number_reflns         3624
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0371
_refine_ls_R_factor_gt           0.0365
_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^)+(0.0457P)^2^+3.9941P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0939
_refine_ls_wR_factor_ref         0.0945
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3536
_reflns_number_total             3624
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8ra03259a2.cif
_cod_data_source_block           ic18196
_cod_database_code               7230800
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.491
_shelx_estimated_absorpt_t_max   0.724
_shelx_res_checksum              64805