N-Heterocyclic carbene-catalyzed cascade annulation reaction of o-vinylarylaldehydes with nitrosoarenes: one-step assembly of functionalized 2,3-benzoxazin-4-ones
Sun, Zhong-Xin; Cheng, Ying; Organic & Biomolecular Chemistry 10 (2012) 4088–; doi:10.1039/c2ob25137j

data_7152321
_publ_section_title
;
 N-Heterocyclic carbene-catalyzed cascade annulation reaction of
 o-vinylarylaldehydes with nitrosoarenes: one-step assembly of
 functionalized 2,3-benzoxazin-4-ones
;
_journal_issue                   20
_journal_name_full               'Organic &amp; Biomolecular Chemistry'
_journal_page_first              4088
_journal_paper_doi               10.1039/c2ob25137j
_journal_volume                  10
_journal_year                    2012
_chemical_absolute_configuration unk
_chemical_formula_sum            'C17 H15 N O4'
_chemical_formula_weight         297.30
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.2571(7)
_cell_length_b                   14.425(2)
_cell_length_c                   23.481(4)
_cell_measurement_reflns_used    2869
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26.19
_cell_measurement_theta_min      2.24
_cell_volume                     1441.9(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      150(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0334
_diffrn_reflns_av_sigmaI/netI    0.0279
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            8433
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         2.24
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9749
_exptl_absorpt_correction_T_min  0.9692
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.370
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.239
_refine_diff_density_min         -0.251
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -2.0(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         1985
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0521
_refine_ls_R_factor_gt           0.0440
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0741P)^2^+0.2020P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1157
_refine_ls_wR_factor_ref         0.1209
_reflns_number_gt                1736
_reflns_number_total             1985
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob25137j.txt
_cod_data_source_block           110402c_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7152321