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_1548476
_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_moiety         'C18 H25 N O3'
_chemical_formula_sum            'C18 H25 N O3'
_chemical_formula_weight         303.39
_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            8
_cell_length_a                   10.6408(3)
_cell_length_b                   17.7283(5)
_cell_length_c                   18.1077(5)
_cell_measurement_reflns_used    8573
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      24.97
_cell_measurement_theta_min      2.22
_cell_volume                     3415.90(17)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 1.000
_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  0.0324
_diffrn_reflns_av_unetI/netI     0.0387
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            22547
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.401
_diffrn_reflns_theta_min         1.608
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6832
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Sheldrich , 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.180
_exptl_crystal_description       Block
_exptl_crystal_F_000             1312
_exptl_crystal_size_max          0.508
_exptl_crystal_size_mid          0.144
_exptl_crystal_size_min          0.119
_refine_diff_density_max         0.239
_refine_diff_density_min         -0.184
_refine_diff_density_rms         0.031
_refine_ls_abs_structure_details
;
 Flack x determined using 1645 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.1(4)
_refine_ls_extinction_coef       0.0014(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     408
_refine_ls_number_reflns         6282
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0700
_refine_ls_R_factor_gt           0.0435
_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^)+(0.0505P)^2^+0.3381P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0928
_refine_ls_wR_factor_ref         0.1034
_reflns_Friedel_coverage         0.781
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                4663
_reflns_number_total             6282
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ncomms7903-s4.cif
_cod_data_source_block           mo_4_mb_032_0m_a_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               1548476
_shelx_estimated_absorpt_t_max   0.991
_shelx_estimated_absorpt_t_min   0.961
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2.a Ternary CH refined with riding coordinates:
 C27(H27), C26(H26), C25(H25), C24(H24), C4(H4), C5(H5), C6(H6), C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C32(H32A,H32B), C28(H28A,H28B), C23(H23A,H23B), C8(H8A,H8B),
 C12(H12A,H12B)
2.c Aromatic/amide H refined with riding coordinates:
 C2(H2), C36(H36), C37(H37), C38(H38), C35(H35), C34(H34), C22(H22), C18(H18),
 C17(H17), C15(H15), C14(H14), C16(H16)
2.d X=CH2 refined with riding coordinates:
 C1(H1A,H1B), C21(H21A,H21B)
2.e Idealised Me refined as rotating group:
 C31(H31A,H31B,H31C), C29(H29A,H29B,H29C), C9(H9A,H9B,H9C), C11(H11A,H11B,H11C)
2.f Idealised tetrahedral OH refined as rotating group with stretchable bonds:
 O4(H4A)
;
_shelx_res_checksum              47756
_shelx_hkl_checksum              93623
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'