Accessing 2-substituted piperidine iminosugars by organometallic addition/intramolecular reductive amination: aldehyde vs nitrone route
Mirabella, Stefania; Fibbi, Giulia; Matassini, Camilla; Faggi, Cristina; Goti, Andrea; Cardona, Francesca; Org. Biomol. Chem.  (2017) –; doi:10.1039/C7OB01848G

data_7155921
_publ_section_title
;
 Accessing 2-substituted piperidine iminosugars by organometallic
 addition/intramolecular reductive amination: aldehyde vs nitrone route
;
_journal_name_full               'Org. Biomol. Chem.'
_journal_paper_doi               10.1039/C7OB01848G
_journal_year                    2017
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C16 H22 O5'
_chemical_formula_sum            'C16 H22 O5'
_chemical_formula_weight         294.33
_chemical_name_systematic
;
benzyl 6-deoxy-2,3-O-(1-methylethylidene)-?-D-mannofuranoside 
;
_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
_audit_creation_date
;
'Thu Dec 04 18:41:08 2014'
;
_audit_creation_method           SHELXL-2014/6
_audit_update_record
;
2017-04-20 deposited with the CCDC.
2017-10-11 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.7984(1)
_cell_length_b                   7.8542(2)
_cell_length_c                   33.8291(8)
_cell_measurement_reflns_used    2724
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      72.397
_cell_measurement_theta_min      5.230
_cell_volume                     1540.64(6)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_molecular_graphics    'Ortep for Windows (Farrugia, 2012)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_computing_structure_solution    'SIR2004 J.Appl.Cryst.38,381-388'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.1241
_diffrn_detector_type            Onyx
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.961
_diffrn_measurement_details
;
  1 omega  -76.00  -15.00   1.0000    2.0000
omega____ theta____ kappa____ phi______ frames
    -      -46.2824   77.0000  -90.0000 61

  2 omega   17.00   75.00   1.0000    2.0000
omega____ theta____ kappa____ phi______ frames
    -       46.2824   77.0000  -60.0000 58

  3 omega  -93.00  -45.00   1.0000    6.0000
omega____ theta____ kappa____ phi______ frames
    -      -90.0000   77.0000   60.0000 48

  4 omega   74.00  125.00   1.0000    6.0000
omega____ theta____ kappa____ phi______ frames
    -      100.0000   77.0000   30.0000 51

  5 omega   83.00  109.00   1.0000    6.0000
omega____ theta____ kappa____ phi______ frames
    -      100.0000   77.0000  -60.0000 26

  6 omega  122.00  148.00   1.0000    6.0000
omega____ theta____ kappa____ phi______ frames
    -      100.0000   77.0000  -60.0000 26

  7 omega  130.00  171.00   1.0000    6.0000
omega____ theta____ kappa____ phi______ frames
    -      100.0000   77.0000   30.0000 41

  8 omega   74.00  168.00   1.0000    6.0000
omega____ theta____ kappa____ phi______ frames
    -      100.0000   77.0000  150.0000 94

;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Onyx'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0418
_diffrn_reflns_av_unetI/netI     0.0514
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.961
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       41
_diffrn_reflns_limit_l_min       -40
_diffrn_reflns_number            4627
_diffrn_reflns_point_group_measured_fraction_full 0.960
_diffrn_reflns_point_group_measured_fraction_max 0.896
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         72.394
_diffrn_reflns_theta_min         5.230
_diffrn_source                   'Enhance (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.772
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.70165
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.269
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.299
_refine_diff_density_min         -0.310
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details
;
 Flack x determined using 820 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.0(1)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.149
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     194
_refine_ls_number_reflns         2724
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.149
_refine_ls_R_factor_all          0.0576
_refine_ls_R_factor_gt           0.0497
_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^)+(0.0530P)^2^+0.7945P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1229
_refine_ls_wR_factor_ref         0.1323
_reflns_Friedel_coverage         0.567
_reflns_Friedel_fraction_full    0.861
_reflns_Friedel_fraction_max     0.800
_reflns_number_gt                2440
_reflns_number_total             2724
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ob01848g2.cif
_cod_data_source_block           1303
_cod_database_code               7155921
_shelxl_version_number           2014/6
_shelx_res_checksum              45754