Synthesis and antiviral evaluation of 6-(alkyl-heteroaryl)furo[2,3-d]pyrimidin-2(3H)-one nucleosides and analogues with ethynyl, ethenyl, and ethyl spacers at C6 of the furopyrimidine core.
Robins, Morris J.; Nowak, Ireneusz; Rajwanshi, Vivek K.; Miranda, Karl; Cannon, John F.; Peterson, Matt A.; Andrei, Graciela; Snoeck, Robert; De Clercq, Erik; Balzarini, Jan; Journal of medicinal chemistry 50 (2007) 3897–3905; doi:10.1021/jm070210n

data_1505030
_publ_section_title
;
 Synthesis and antiviral evaluation of
 6-(alkyl-heteroaryl)furo[2,3-d]pyrimidin-2(3H)-one nucleosides and
 analogues with ethynyl, ethenyl, and ethyl spacers at C6 of the
 furopyrimidine core.
;
_journal_issue                   16
_journal_name_full               'Journal of medicinal chemistry'
_journal_page_first              3897
_journal_page_last               3905
_journal_paper_doi               10.1021/jm070210n
_journal_volume                  50
_journal_year                    2007
_chemical_absolute_configuration rm
_chemical_formula_sum            'C21 H24 N2 O5'
_chemical_formula_weight         384.42
_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                 95.15(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.6665(13)
_cell_length_b                   5.7707(12)
_cell_length_c                   25.533(5)
_cell_measurement_reflns_used    2545
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      27.69
_cell_measurement_theta_min      3.06
_cell_volume                     978.3(3)
_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      298(2)
_diffrn_measured_fraction_theta_full 0.889
_diffrn_measured_fraction_theta_max 0.889
_diffrn_measurement_device_type  'Bruker Nonius Apex II CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  'Montel 200 mirrors'
_diffrn_radiation_source         'Bruker Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0469
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            4181
_diffrn_reflns_theta_full        25.39
_diffrn_reflns_theta_max         25.39
_diffrn_reflns_theta_min         3.62
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9981
_exptl_absorpt_correction_T_min  0.9706
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; Sheldrick, 2003'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.305
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             408
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.124
_refine_diff_density_min         -0.116
_refine_diff_density_rms         0.027
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.9(19)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.273
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     256
_refine_ls_number_reflns         2549
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.272
_refine_ls_R_factor_all          0.0793
_refine_ls_R_factor_gt           0.0569
_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^)+(0.0228P)^2^+0.1616P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1037
_refine_ls_wR_factor_ref         0.1132
_reflns_number_gt                2040
_reflns_number_total             2549
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jm070210nsi20070222_061741.cif
_cod_data_source_block           xl1093r_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1505030