Direct synthesis of 5- and 6-substituted 2-aminopyrimidines as potential non-natural nucleobase analogues
Radhakrishnan, K.; Sharma, Namita; Kundu, Lal Mohan; RSC Adv. 4 (2014) 15087–; doi:10.1039/C4RA00249K

data_7235464
_publ_section_title
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 Direct synthesis of 5- and 6-substituted 2-aminopyrimidines as potential
 non-natural nucleobase analogues
;
_journal_issue                   29
_journal_name_full               'RSC Adv.'
_journal_page_first              15087
_journal_paper_doi               10.1039/C4RA00249K
_journal_volume                  4
_journal_year                    2014
_chemical_formula_moiety         '2(C8 H13 N3 O), H2 O'
_chemical_formula_sum            'C16 H28 N6 O3'
_chemical_formula_weight         352.44
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'C 1 2/c 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                 103.855(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   19.3425(7)
_cell_length_b                   13.9961(7)
_cell_length_c                   14.4876(6)
_cell_measurement_temperature    296(2)
_cell_volume                     3808.0(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0287
_diffrn_reflns_av_sigmaI/netI    0.0152
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            17056
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25
_diffrn_reflns_theta_min         1.81
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.987
_exptl_absorpt_correction_T_min  0.977
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.230
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1520
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.205
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.007
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     256
_refine_ls_number_reflns         3352
_refine_ls_number_restraints     8
_refine_ls_restrained_S_all      1.552
_refine_ls_R_factor_all          0.0512
_refine_ls_R_factor_gt           0.0438
_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^)+(0.0500P)^2^+6.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1038
_refine_ls_wR_factor_ref         0.1083
_reflns_number_gt                2518
_reflns_number_total             3352
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ra00249k2.cif
_cod_data_source_block           5-methyl-6-isopropylisocytosine_tautomer
_cod_depositor_comments
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The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/RSC/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7235464