Photoinduced [4 + 4], [4 + 2], and [2 + 2] Cycloadditions of o-Quinones with Oxazoles: Chemo-, Regio-, and Diastereoselectivity
Lei Wang; Yu-Cheng Huang; Yang Liu; Hoong-Kun Fun; Yan Zhang; Jian-Hua Xu; Journal of Organic Chemistry 75 (2010) 7757–7768; doi:10.1021/jo101764f

data_4025837
_publ_section_title
;
 Photoinduced [4 + 4], [4 + 2], and [2 + 2] Cycloadditions of o-Quinones
 with Oxazoles: Chemo-, Regio-, and Diastereoselectivity
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              7757
_journal_page_last               7768
_journal_paper_doi               10.1021/jo101764f
_journal_volume                  75
_journal_year                    2010
_chemical_formula_moiety         'C25 H19 N O3'
_chemical_formula_sum            'C25 H19 N O3'
_chemical_formula_weight         381.41
_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            8
_cell_length_a                   12.7197(7)
_cell_length_b                   14.9537(8)
_cell_length_c                   19.9989(11)
_cell_measurement_reflns_used    7225
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.30
_cell_measurement_theta_min      2.34
_cell_volume                     3803.9(4)
_computing_cell_refinement       'SAINT (Siemens, 1996)'
_computing_data_collection       'SMART (Siemens, 1996)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material
;
SHELXTL, PARST (Nardelli, 1995) and PLATON (Spek, 1990)
;
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type
;
Siemens SMART CCD area detector diffractometer
;
_diffrn_measurement_method       '\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  0.0327
_diffrn_reflns_av_sigmaI/netI    0.0491
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            24094
_diffrn_reflns_theta_full        28.29
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         2.34
_diffrn_standards_decay_%        negligible
_diffrn_standards_interval_count none
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.332
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1600
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.352
_refine_diff_density_min         -0.240
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.3(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.090
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     523
_refine_ls_number_reflns         9276
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.090
_refine_ls_R_factor_all          0.0940
_refine_ls_R_factor_gt           0.0606
_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^)+(0.0489P)^2^+0.7564P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1156
_refine_ls_wR_factor_ref         0.1282
_reflns_number_gt                6545
_reflns_number_total             9276
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo101764f_si_001_1.cif
_cod_data_source_block           wl07m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to the built-in table from CIF Core
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_database_code               4025837