Efficient preparation of 2,4-diaminopyrimidine nucleosides: total synthesis of lysidine and agmatidine.
Kopina, Brett J.; Lauhon, Charles T.; Organic letters 14 (2012) 4118–4121; doi:10.1021/ol301769j

data_1508337
_publ_section_title
;
 Efficient preparation of 2,4-diaminopyrimidine nucleosides: total
 synthesis of lysidine and agmatidine.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              4118
_journal_page_last               4121
_journal_paper_doi               10.1021/ol301769j
_journal_volume                  14
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C21 H26 Br N4 O6, C3 H8 O, Cl'
_chemical_formula_sum            'C24 H34 Br Cl N4 O7'
_chemical_formula_weight         605.91
_chemical_name_common            12090a
_space_group_IT_number           1
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                102.962(1)
_cell_angle_beta                 94.380(1)
_cell_angle_gamma                93.876(1)
_cell_formula_units_Z            1
_cell_length_a                   5.6722(6)
_cell_length_b                   8.1511(9)
_cell_length_c                   14.9077(17)
_cell_measurement_reflns_used    2998
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.31
_cell_measurement_theta_min      2.63
_cell_volume                     667.18(13)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0153
_diffrn_reflns_av_sigmaI/netI    0.0381
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            7673
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         2.57
_exptl_absorpt_coefficient_mu    1.691
_exptl_absorpt_correction_T_max  0.8908
_exptl_absorpt_correction_T_min  0.5659
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008/1)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.508
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             314
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.423
_refine_diff_density_min         -0.451
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.001(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     382
_refine_ls_number_reflns         5802
_refine_ls_number_restraints     22
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0440
_refine_ls_R_factor_gt           0.0369
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0323P)^2^+0.2920P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0752
_refine_ls_wR_factor_ref         0.0787
_reflns_number_gt                5164
_reflns_number_total             5802
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol301769j_si_003.cif
_cod_data_source_block           12090a
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P1
_cod_database_code               1508337