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_1548477
_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            'C18 H23 N O3'
_chemical_formula_weight         301.37
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.3102(3)
_cell_length_b                   9.6848(3)
_cell_length_c                   18.5136(6)
_cell_measurement_reflns_used    7941
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.39
_cell_measurement_theta_min      2.37
_cell_volume                     1669.32(9)
_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  0.0355
_diffrn_reflns_av_unetI/netI     0.0264
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            11009
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.411
_diffrn_reflns_theta_min         2.200
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6776
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Sheldrich , 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.199
_exptl_crystal_description       Block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.568
_exptl_crystal_size_mid          0.394
_exptl_crystal_size_min          0.208
_refine_diff_density_max         0.130
_refine_diff_density_min         -0.122
_refine_diff_density_rms         0.026
_refine_ls_abs_structure_details
;
 Flack x determined using 1166 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.6(4)
_refine_ls_extinction_coef       0.0081(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   1.069
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     206
_refine_ls_number_reflns         3081
_refine_ls_number_restraints     177
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0351
_refine_ls_R_factor_gt           0.0320
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 w=1/[\s^2^(Fo^2^)+(0.0317P)^2^+0.2569P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0775
_refine_ls_wR_factor_ref         0.0798
_reflns_Friedel_coverage         0.728
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                2886
_reflns_number_total             3081
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ncomms7903-s5.cif
_cod_data_source_block           mo_1MM033_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_database_code               1548477
_shelx_estimated_absorpt_t_min   0.955
_shelx_estimated_absorpt_t_max   0.983
_shelxl_version_number           2013-2
_shelx_res_checksum              49297
_shelx_hkl_checksum              39439