Synthesis and structural studies of S-type/N-type-locked/frozen nucleoside analogues and their incorporation in RNA-selective, nuclease resistant 2'-5' linked oligonucleotides.
Erande, Namrata; Gunjal, Anita D.; Fernandes, Moneesha; Gonnade, Rajesh; Kumar, Vaijayanti A.; Organic & biomolecular chemistry 11 (2013) 746–757; doi:10.1039/c2ob26762d

data_7152770
_publ_section_title
;
 Synthesis and structural studies of S-type/N-type-locked/frozen
 nucleoside analogues and their incorporation in RNA-selective, nuclease
 resistant 2'-5' linked oligonucleotides.
;
_journal_issue                   5
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              746
_journal_page_last               757
_journal_paper_doi               10.1039/c2ob26762d
_journal_volume                  11
_journal_year                    2013
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C9 H11 F N2 O5'
_chemical_formula_sum            'C9 H11 F N2 O5'
_chemical_formula_weight         246.20
_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                 92.277(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.3007(3)
_cell_length_b                   7.3372(3)
_cell_length_c                   10.8989(4)
_cell_measurement_reflns_used    3861
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      35.965
_cell_measurement_theta_min      3.347
_cell_volume                     503.45(4)
_computing_cell_refinement       'SMART (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        'SAINT(Bruker, 2000)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  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 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'BRUKER SMART APEX'
_diffrn_measurement_device_type  'CCD Area Detector'
_diffrn_measurement_method       'Omega and phi Scan'
_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  0.0175
_diffrn_reflns_av_sigmaI/netI    0.0150
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            10593
_diffrn_reflns_theta_full        27.99
_diffrn_reflns_theta_max         27.99
_diffrn_reflns_theta_min         1.87
_exptl_absorpt_coefficient_mu    0.144
_exptl_absorpt_correction_T_max  0.9689
_exptl_absorpt_correction_T_min  0.9209
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'bruker sadabs'
_exptl_crystal_colour            COLOURLESS
_exptl_crystal_density_diffrn    1.624
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             256
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.271
_refine_diff_density_min         -0.174
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.2(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     162
_refine_ls_number_reflns         2440
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0242
_refine_ls_R_factor_gt           0.0239
_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^)+(0.0411P)^2^+0.0860P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0643
_refine_ls_wR_factor_ref         0.0645
_reflns_number_gt                2398
_reflns_number_total             2440
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob26762d.txt
_cod_data_source_block           uxf
_cod_original_sg_symbol_H-M      P21
_cod_database_code               7152770