Highly Stereoselective, One-Pot Synthesis of Azetidines and 2,4-Dioxo-1,3-diazabicyclo[3.2.0] Compounds Mediated by I2
Chun-Bao Miao; Chun-Ping Dong; Min Zhang; Wen-Long Ren; Qi Meng; Xiao-Qiang Sun; Hai-Tao Yang; Journal of Organic Chemistry 78 (2013) 4329–4340; doi:10.1021/jo400181r

data_4028194
_publ_section_title
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 Highly Stereoselective, One-Pot Synthesis of Azetidines and
 2,4-Dioxo-1,3-diazabicyclo[3.2.0] Compounds Mediated by I2
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              4329
_journal_page_last               4340
_journal_paper_doi               10.1021/jo400181r
_journal_volume                  78
_journal_year                    2013
_chemical_absolute_configuration unk
_chemical_formula_sum            'C26 H19 N2 O5'
_chemical_formula_weight         439.43
_chemical_name_systematic
; 
 ? 
;
_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                   8.6536(8)
_cell_length_b                   11.2113(10)
_cell_length_c                   23.211(2)
_cell_measurement_temperature    296(2)
_cell_volume                     2251.9(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0323
_diffrn_reflns_av_sigmaI/netI    0.0404
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            14914
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.9865
_exptl_absorpt_correction_T_min  0.9559
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.296
_exptl_crystal_description       block
_exptl_crystal_F_000             916
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.412
_refine_diff_density_min         -0.150
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.1(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.984
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     303
_refine_ls_number_reflns         5170
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.984
_refine_ls_R_factor_all          0.0724
_refine_ls_R_factor_gt           0.0453
_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^)+(0.0751P)^2^+0.0524P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1129
_refine_ls_wR_factor_ref         0.1297
_reflns_number_gt                3676
_reflns_number_total             5170
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo400181r_si_004.cif
_cod_data_source_block           mo_120529b_0m
_cod_original_cell_volume        2251.8(3)
_cod_database_code               4028194