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_4507419
_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         'C21 H24 N2 O5'
_chemical_formula_sum            'C21 H24 N2 O5'
_chemical_formula_weight         384.42
_chemical_name_common            'compound 5c'
_chemical_name_systematic
;
anti-12-Hydroxy-4-tert-butyl-6-methyl-10,11-benzo-5,16-dioxa-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                   9.2552(8)
_cell_length_b                   10.3088(9)
_cell_length_c                   20.2933(19)
_cell_measurement_reflns_used    9317
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      24.86
_cell_measurement_theta_min      2.22
_cell_volume                     1936.2(3)
_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  0.0556
_diffrn_reflns_av_sigmaI/netI    0.0146
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            103049
_diffrn_reflns_theta_full        26.03
_diffrn_reflns_theta_max         26.03
_diffrn_reflns_theta_min         2.01
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.9813
_exptl_absorpt_correction_T_min  0.9367
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.319
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.188
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.060
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.3(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     258
_refine_ls_number_reflns         3816
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0568
_refine_ls_R_factor_gt           0.0506
_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^)+(0.0919P)^2^+0.6564P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1435
_refine_ls_wR_factor_ref         0.1509
_reflns_number_gt                3445
_reflns_number_total             3816
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            co3001296_si_002.cif
_cod_data_source_block           5c
_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               4507419