Six-Membered Ring Phosphates and Phosphonates As Model Compounds for Cyclic Phosphate Prodrugs: Is the Anomeric Effect Involved in the Selective and Spontaneous Cleavage of Cyclic Phosphate Prodrugs?
Silvano Cruz-Gregorio; Vicente Rodríguez-Palacios; Herbert Höfl; Leticia Quintero; Fernando Sartillo-Piscil; Journal of Organic Chemistry 74 (2009) 197–205; doi:10.1021/jo8017473

data_4024226
_publ_section_title
;
Six-Membered Ring Phosphates and Phosphonates As Model Compounds for Cyclic
Phosphate Prodrugs: Is the Anomeric Effect Involved in the Selective and
Spontaneous Cleavage of Cyclic Phosphate Prodrugs?
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              197
_journal_page_last               205
_journal_paper_doi               10.1021/jo8017473
_journal_volume                  74
_journal_year                    2009
_chemical_formula_moiety         'C20 H20 Cl O7 P'
_chemical_formula_sum            'C20 H20 Cl O7 P'
_chemical_formula_weight         438.78
_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                 109.526(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.5781(17)
_cell_length_b                   5.6986(8)
_cell_length_c                   14.879(2)
_cell_measurement_reflns_used    2445
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      21.85
_cell_measurement_theta_min      2.59
_cell_volume                     1005.2(2)
_computing_cell_refinement       'Bruker SAINT'
_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      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0279
_diffrn_reflns_av_sigmaI/netI    0.0441
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            6247
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.45
_exptl_absorpt_coefficient_mu    0.310
_exptl_absorpt_correction_T_max  0.9637
_exptl_absorpt_correction_T_min  0.8554
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.450
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular prism'
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.211
_refine_diff_density_min         -0.185
_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   -0.13(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     264
_refine_ls_number_reflns         3117
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0477
_refine_ls_R_factor_gt           0.0413
_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^)+(0.0516P)^2^+0.0579P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0946
_refine_ls_wR_factor_ref         0.0978
_reflns_number_gt                2755
_reflns_number_total             3117
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo8017473_si_003.cif
_cod_data_source_block           saleinm
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               4024226