The synthesis and structural characterization of both diastereomers of 5’-(hydroxymethyl)-6,5’-cyclo-2’,5’-dideoxyuridine cyclonucleosides
Yu, Hongchuan; Schlegel, Mark K.; McLaughlin, Larry W.; RSC Advances  (2014) –; doi:10.1039/c4ra04784b

data_7217012
_publ_section_title
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 The synthesis and structural characterization of both diastereomers of
 5&#x2019;-(hydroxymethyl)-6,5&#x2019;-cyclo-2&#x2019;,5&#x2019;-dideoxyuridine
 cyclonucleosides
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_journal_name_full               'RSC Advances'
_journal_paper_doi               10.1039/c4ra04784b
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C10 H12 N2 O5'
_chemical_formula_sum            'C10 H12 N2 O5'
_chemical_formula_weight         240.22
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 102.701(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.8546(6)
_cell_length_b                   5.0786(4)
_cell_length_c                   12.4411(9)
_cell_measurement_reflns_used    3587
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      66.17
_cell_measurement_theta_min      3.64
_cell_volume                     484.14(6)
_computing_cell_refinement       'SAINT (Bruker, 2010)'
_computing_data_collection       'APEX2 (Bruker, 2010)'
_computing_data_reduction        'SAINT (Bruker, 2010)'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Bruker Kappa DUO CCD diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0311
_diffrn_reflns_av_sigmaI/netI    0.0324
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            4042
_diffrn_reflns_theta_full        66.17
_diffrn_reflns_theta_max         66.17
_diffrn_reflns_theta_min         3.64
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_type              'Incoatec I\uS'
_exptl_absorpt_coefficient_mu    1.145
_exptl_absorpt_correction_T_max  0.9344
_exptl_absorpt_correction_T_min  0.8469
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G.M. (2008). SADABS v2008/1. Bruker AXS Inc. Madison, WI USA.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.648
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       block
_exptl_crystal_F_000             252
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.152
_refine_diff_density_min         -0.218
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.1(2)
_refine_ls_extinction_coef       na
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     175
_refine_ls_number_reflns         1588
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0297
_refine_ls_R_factor_gt           0.0288
_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^)+(0.0515P)^2^+0.0553P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0755
_refine_ls_wR_factor_ref         0.0763
_reflns_number_gt                1544
_reflns_number_total             1588
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ra04784b2.cif
_cod_data_source_block           C10H12N2O5
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7217012