Chemo-enzymatic synthesis of bicyclic 3′-azido- and 3′-amino-nucleosides
Kumar, Manish; Sharma, Vivek; Olsen, carl E; Prasad, Ashok; RSC Advances  (2014) –; doi:10.1039/C4RA06805J

data_7217739
_publ_section_title
;
 Chemo-enzymatic synthesis of bicyclic 3&#x2032;-azido- and
 3&#x2032;-amino-nucleosides
;
_journal_name_full               'RSC Advances'
_journal_paper_doi               10.1039/C4RA06805J
_journal_year                    2014
_chemical_formula_moiety         'C18 H23 N3 O8 S'
_chemical_formula_sum            'C18 H23 N3 O8 S'
_chemical_formula_weight         441.45
_chemical_name_systematic
; 
 ? 
;
_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                 101.077(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.9038(14)
_cell_length_b                   13.785(3)
_cell_length_c                   16.149(3)
_cell_measurement_temperature    298(2)
_cell_volume                     2163.6(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_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  0.0420
_diffrn_reflns_av_sigmaI/netI    0.0735
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            13901
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.97
_exptl_absorpt_coefficient_mu    0.198
_exptl_absorpt_correction_T_max  0.9728
_exptl_absorpt_correction_T_min  0.9540
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.355
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             928
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.190
_refine_diff_density_min         -0.173
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.05(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.990
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     549
_refine_ls_number_reflns         6745
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.990
_refine_ls_R_factor_all          0.0845
_refine_ls_R_factor_gt           0.0545
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0401P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0992
_refine_ls_wR_factor_ref         0.1118
_reflns_number_gt                4723
_reflns_number_total             6745
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ra06805j3.cif
_cod_data_source_block           shelxl
_cod_original_cell_volume        2163.7(6)
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7217739