Structure of Cyclic Nucleoside Phosphonate Ester Prodrugs: An Inquiry
Ivan S. Krylov; Valeria M. Zakharova; Michaela Serpi; Ralf Haiges; Boris A. Kashemirov; Charles E. McKenna; Journal of Organic Chemistry 77 (2012) 684–689; doi:10.1021/jo201735f

data_4026830
_publ_section_title
;
 Structure of Cyclic Nucleoside Phosphonate Ester Prodrugs: An Inquiry
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              684
_journal_page_last               689
_journal_paper_doi               10.1021/jo201735f
_journal_volume                  77
_journal_year                    2012
_chemical_formula_sum            'C15 H20 N3 O6 P'
_chemical_formula_weight         369.31
_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                   6.9562(10)
_cell_length_b                   6.9956(10)
_cell_length_c                   34.129(5)
_cell_measurement_reflns_used    5010
_cell_measurement_temperature    133(2)
_cell_measurement_theta_max      26.79
_cell_measurement_theta_min      2.97
_cell_volume                     1660.8(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      133(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.1575
_diffrn_reflns_av_sigmaI/netI    0.1167
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            14401
_diffrn_reflns_theta_full        27.54
_diffrn_reflns_theta_max         27.54
_diffrn_reflns_theta_min         2.39
_exptl_absorpt_coefficient_mu    0.204
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.477
_exptl_crystal_density_meas      0
_exptl_crystal_description       blade
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.65
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.389
_refine_diff_density_min         -0.347
_refine_diff_density_rms         0.058
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.20(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.903
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         3769
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.903
_refine_ls_R_factor_all          0.0715
_refine_ls_R_factor_gt           0.0505
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0156P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0969
_refine_ls_wR_factor_ref         0.1045
_reflns_number_gt                2749
_reflns_number_total             3769
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo201735f_si_001.cif
_cod_data_source_block           valeriam
_cod_database_code               4026830