[3 + 2] Cycloaddition/Oxidative Aromatization Sequence via Photoredox Catalysis: One-Pot Synthesis of Oxazoles from 2H-Azirines and Aldehydes.
Zeng, Ting-Ting; Xuan, Jun; Ding, Wei; Wang, Kuan; Lu, Liang-Qiu; Xiao, Wen-Jing; Organic letters 17 (2015) 4070–4073; doi:10.1021/acs.orglett.5b01994

data_1529374
_publ_section_title
;
 [3 + 2] Cycloaddition/Oxidative Aromatization Sequence via Photoredox
 Catalysis: One-Pot Synthesis of Oxazoles from 2H-Azirines and Aldehydes.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              4070
_journal_page_last               4073
_journal_paper_doi               10.1021/acs.orglett.5b01994
_journal_volume                  17
_journal_year                    2015
_chemical_formula_sum            'C22 H20 N2 O2 S'
_chemical_formula_weight         376.46
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.891(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.5958(16)
_cell_length_b                   12.0999(17)
_cell_length_c                   14.031(2)
_cell_measurement_reflns_used    9981
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      31.96
_cell_measurement_theta_min      2.23
_cell_volume                     1950.0(5)
_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-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      297(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0950
_diffrn_reflns_av_sigmaI/netI    0.0610
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            20715
_diffrn_reflns_theta_full        31.00
_diffrn_reflns_theta_max         31.00
_diffrn_reflns_theta_min         1.77
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.185
_exptl_absorpt_correction_T_max  0.9817
_exptl_absorpt_correction_T_min  0.9639
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            clorless
_exptl_crystal_density_diffrn    1.282
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.322
_refine_diff_density_min         -0.447
_refine_diff_density_rms         0.062
_refine_ls_extinction_coef       0.0202(19)
_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   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         6188
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0693
_refine_ls_R_factor_gt           0.0529
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0652P)^2^+0.5044P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1371
_refine_ls_wR_factor_ref         0.1551
_reflns_number_gt                4733
_reflns_number_total             6188
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b01994_si_002.cif
_cod_data_source_block           g:\150613a\work\mo_150613a_0m
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 

 Adding full bibliography for 1529374.cif.
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_cod_original_cell_volume        1950.1(5)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1529374