Synthesis of Azacyclic Nucleoside Analogues via Asymmetric [3 + 2] Cycloaddition of 9-(2-Tosylvinyl)-9H-purines.
Zhang, Dan-Jie; Xie, Ming-Sheng; Qu, Gui-Rong; Gao, Yao-Wei; Guo, Hai-Ming; Organic letters 18 (2016) 820–823; doi:10.1021/acs.orglett.6b00108

data_1542403
_publ_section_title
;
 Synthesis of Azacyclic Nucleoside Analogues via Asymmetric [3 + 2]
 Cycloaddition of 9-(2-Tosylvinyl)-9H-purines.
;
_journal_issue                   4
_journal_name_full               'Organic letters'
_journal_page_first              820
_journal_page_last               823
_journal_paper_doi               10.1021/acs.orglett.6b00108
_journal_volume                  18
_journal_year                    2016
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C31 H28 Cl N5 O6 S2'
_chemical_formula_sum            'C31 H28 Cl N5 O6 S2'
_chemical_formula_weight         666.15
_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                   5.9591(12)
_cell_length_b                   9.2931(19)
_cell_length_c                   55.530(11)
_cell_measurement_reflns_used    3917
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      19.98
_cell_measurement_theta_min      2.22
_cell_volume                     3075.2(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT  A '
_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      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0483
_diffrn_reflns_av_sigmaI/netI    0.0451
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       66
_diffrn_reflns_limit_l_min       -64
_diffrn_reflns_number            21551
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.20
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.313
_exptl_absorpt_correction_T_max  0.9693
_exptl_absorpt_correction_T_min  0.8849
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            COLOURLESS
_exptl_crystal_density_diffrn    1.439
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             1384
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.152
_refine_diff_density_min         -0.220
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(8)
_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     406
_refine_ls_number_reflns         5373
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0619
_refine_ls_R_factor_gt           0.0446
_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^)+(0.0285P)^2^+1.4342P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0882
_refine_ls_wR_factor_ref         0.0954
_reflns_number_gt                4283
_reflns_number_total             5373
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol6b00108_si_002.cif
_cod_data_source_block           t
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_absolute_configuration' value 'UNK' changed to 'unk'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/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
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

'_refine_ls_hydrogen_treatment' value 'CONSTR' changed to 'constr'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 1542403.cif.
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_cod_database_code               1542403