Hypervalent iodane mediated reactions of N-acetyl enamines for the synthesis of oxazoles and imidazoles.
Xu, Kang; Yang, Ruiqi; Yang, Shuang; Jiang, Cheng; Ding, Zhenhua; Organic & biomolecular chemistry 17 (2019) 8977–8981; doi:10.1039/c9ob01895f

data_7157114
_publ_section_title
;
 Hypervalent iodane mediated reactions of N-acetyl enamines for the
 synthesis of oxazoles and imidazoles.
;
_journal_issue                   40
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              8977
_journal_page_last               8981
_journal_paper_doi               10.1039/c9ob01895f
_journal_volume                  17
_journal_year                    2019
_chemical_formula_moiety         'C12 H11 Br N2 O2'
_chemical_formula_sum            'C12 H11 Br N2 O2'
_chemical_formula_weight         295.14
_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
_atom_sites_solution_primary     dual
_audit_creation_date             2019-04-09
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-06-05 deposited with the CCDC.    2019-09-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   9.930(3)
_cell_length_b                   9.524(3)
_cell_length_c                   24.977(8)
_cell_measurement_reflns_used    4532
_cell_measurement_temperature    100
_cell_measurement_theta_max      25.773
_cell_measurement_theta_min      2.620
_cell_volume                     2362.2(13)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_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      100.0
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0833
_diffrn_reflns_av_unetI/netI     0.0608
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            17419
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.533
_diffrn_reflns_theta_min         2.621
_exptl_absorpt_coefficient_mu    3.471
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6057
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1288 before and 0.0799 after correction. The Ratio of minimum to maximum transmission is 0.8124. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.660
_exptl_crystal_description       needle
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.553
_refine_diff_density_min         -0.713
_refine_diff_density_rms         0.109
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     160
_refine_ls_number_reflns         2701
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0829
_refine_ls_R_factor_gt           0.0451
_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^)+(0.0446P)^2^+3.3833P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0978
_refine_ls_wR_factor_ref         0.1142
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1887
_reflns_number_total             2701
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9ob01895f2.cif
_cod_data_source_block           22019358xj_0m
_cod_depositor_comments
'Adding full bibliography for 7157113--7157114.cif.'
_cod_original_cell_volume        2362.0(13)
_cod_database_code               7157114
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.874
_shelx_estimated_absorpt_t_min   0.769
_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. Restrained distances
 N1-H1
 0.87 with sigma of 0.02
3.a Aromatic/amide H refined with riding coordinates:
 C1(H1A), C5(H5), C3(H3), C4(H4)
3.b Idealised Me refined as rotating group:
 C12(H12A,H12B,H12C), C11(H11A,H11B,H11C)
;
_olex2_submission_special_instructions 'No special instructions were received'