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_4507424
_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         'C19 H17 N2 O5'
_chemical_formula_sum            'C19 H17 N2 O5'
_chemical_formula_weight         353.35
_chemical_name_common            'Compound 8b'
_chemical_name_systematic
;
anti-1-Hydroxy-5,10-dioxa-8,14-diaza-11-methyl-
hexacyclo[13.6.1.0^2,6^.0^6,14^.0^8,12^.0^19,22^]doeicos-
3,15,17,19(22)-tetraene-7,13-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                   8.9205(2)
_cell_length_b                   12.2652(3)
_cell_length_c                   15.6666(4)
_cell_measurement_reflns_used    9088
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.44
_cell_measurement_theta_min      2.60
_cell_volume                     1714.11(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  0.0223
_diffrn_reflns_av_sigmaI/netI    0.0048
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            101821
_diffrn_reflns_theta_full        26.44
_diffrn_reflns_theta_max         26.44
_diffrn_reflns_theta_min         2.11
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_T_max  0.9900
_exptl_absorpt_correction_T_min  0.9519
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.369
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             740
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.10
_platon_squeeze_details
;
;
_refine_diff_density_max         0.383
_refine_diff_density_min         -0.218
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.0(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.885
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     237
_refine_ls_number_reflns         3529
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.885
_refine_ls_R_factor_all          0.0450
_refine_ls_R_factor_gt           0.0449
_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^)+(0.2000P)^2^+0.1659P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1840
_refine_ls_wR_factor_ref         0.1846
_reflns_number_gt                3500
_reflns_number_total             3529
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            co3001296_si_002.cif
_cod_data_source_block           8b
_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 2.4.2 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               4507424