Direct synthesis of imino-C-nucleoside analogues and other biologically active iminosugars
Milan Bergeron-Brlek; Michael Meanwell; Robert Britton; Nature Communications 6 (2015) 6903–; doi:10.1038/ncomms7903

data_1548474
_publ_section_title
;
 Direct synthesis of imino-C-nucleoside analogues and other biologically
 active iminosugars
;
_journal_name_full               'Nature Communications'
_journal_page_first              6903
_journal_paper_doi               10.1038/ncomms7903
_journal_volume                  6
_journal_year                    2015
_chemical_absolute_configuration syn
_chemical_formula_sum            'C21 H25 N O3'
_chemical_formula_weight         339.42
_space_group_crystal_system      tetragonal
_space_group_IT_number           76
_space_group_name_Hall           'P 4w'
_space_group_name_H-M_alt        'P 41'
_symmetry_space_group_name_Hall  'P 4w'
_symmetry_space_group_name_H-M   'P 41'
_atom_sites_solution_hydrogens   geom
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.5905(2)
_cell_length_b                   9.5905(2)
_cell_length_c                   19.7424(5)
_cell_measurement_reflns_used    9355
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.40
_cell_measurement_theta_min      2.36
_cell_volume                     1815.86(7)
_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-2014 (Sheldrick 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0185
_diffrn_reflns_av_unetI/netI     0.0145
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            11982
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.398
_diffrn_reflns_theta_min         2.124
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6870
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Sheldrich , 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.242
_exptl_crystal_description       Block
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.660
_exptl_crystal_size_mid          0.398
_exptl_crystal_size_min          0.219
_refine_diff_density_max         0.247
_refine_diff_density_min         -0.121
_refine_diff_density_rms         0.024
_refine_ls_abs_structure_details
;
 Flack x determined using 1496 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.2(2)
_refine_ls_extinction_coef       0.0131(16)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         3326
_refine_ls_number_restraints     208
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0304
_refine_ls_R_factor_gt           0.0286
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 w=1/[\s^2^(Fo^2^)+(0.0357P)^2^+0.2887P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0715
_refine_ls_wR_factor_ref         0.0726
_reflns_Friedel_coverage         0.924
_reflns_Friedel_fraction_full    0.984
_reflns_Friedel_fraction_max     0.984
_reflns_number_gt                3179
_reflns_number_total             3326
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ncomms7903-s2.cif
_cod_data_source_block           mo_1MM025_0m_a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to the built-in table from CIF Core dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 5376 2017-05-30 11:51:03Z andrius 
;
_cod_original_cell_volume        1815.86(9)
_cod_database_code               1548474
_shelx_estimated_absorpt_t_min   0.948
_shelx_estimated_absorpt_t_max   0.982
_shelxl_version_number           2013-2
_shelx_res_checksum              24408
_shelx_hkl_checksum              88332