Photoassisted Access to Enantiopure Conformationally Locked Ribofuranosylamines Spiro-Linked to Oxazolidino-Diketopiperazines.
Nandurkar, Nitin S.; Kumar, N. N. Bhuvan; Mukhina, Olga A.; Kutateladze, Andrei G.; ACS Combinatorial Science 15 (2013) 73–; doi:10.1021/co3001296

data_4507421
_publ_section_title
;
 Photoassisted Access to Enantiopure Conformationally Locked
 Ribofuranosylamines Spiro-Linked to Oxazolidino-Diketopiperazines.
;
_journal_issue                   1
_journal_name_full               'ACS Combinatorial Science'
_journal_page_first              73
_journal_paper_doi               10.1021/co3001296
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C20 H23 N2 O4 S'
_chemical_formula_sum            'C20 H23 N2 O4 S'
_chemical_formula_weight         387.46
_chemical_name_common            'Compound 5e'
_chemical_name_systematic
;
anti-12-Hydroxy-4-tert-butyl-10,11-benzo-16-oxa-5-thia-3,9-
diazatetracyclo[11.2.1.0^1,9^.0^3,7^]hexadeca-10,14-diene-2,8-dione 
;
_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                   7.9958(2)
_cell_length_b                   10.2771(2)
_cell_length_c                   22.7057(5)
_cell_measurement_reflns_used    9075
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      31.16
_cell_measurement_theta_min      2.55
_cell_volume                     1865.81(7)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker D8 APEX II Diffractometer'
_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  0.0225
_diffrn_reflns_av_sigmaI/netI    0.0051
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            109409
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         1.79
_exptl_absorpt_coefficient_mu    0.203
_exptl_absorpt_correction_T_max  0.9664
_exptl_absorpt_correction_T_min  0.9231
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.379
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             820
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.205
_refine_diff_density_min         -0.244
_refine_diff_density_rms         0.072
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.618
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         3806
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.618
_refine_ls_R_factor_all          0.0281
_refine_ls_R_factor_gt           0.0277
_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^)+(0.1144P)^2^+0.3434P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0820
_refine_ls_wR_factor_ref         0.0834
_reflns_number_gt                3766
_reflns_number_total             3806
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            co3001296_si_002.cif
_cod_data_source_block           5e
_cod_depositor_comments
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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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P2(1)2(1)2(1) '
_cod_database_code               4507421