Synthesis of l-Iduronic Acid Derivatives via [3.2.1] and [2.2.2] l-Iduronic Lactones from Bulk Glucose-Derived Cyanohydrin Hydrolysis: A Reversible Conformationally Switched Superdisarmed/Rearmed Lactone Route to Heparin Disaccharides.
Hansen, Steen U.; Dalton, Charlotte E.; Baráth, Marek; Kwan, Glenn; Raftery, James; Jayson, Gordon C.; Miller, Gavin J.; Gardiner, John M.; The Journal of organic chemistry 80 (2015) 3777–3789; doi:10.1021/jo502776f

data_4030929
_publ_section_title
;
 Synthesis of l-Iduronic Acid Derivatives via [3.2.1] and [2.2.2]
 l-Iduronic Lactones from Bulk Glucose-Derived Cyanohydrin Hydrolysis: A
 Reversible Conformationally Switched Superdisarmed/Rearmed Lactone Route
 to Heparin Disaccharides.
;
_journal_issue                   8
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              3777
_journal_page_last               3789
_journal_paper_doi               10.1021/jo502776f
_journal_volume                  80
_journal_year                    2015
_chemical_absolute_configuration ad
_chemical_formula_sum            'C26 H22 O6 S'
_chemical_formula_weight         462.50
_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                   9.5965(9)
_cell_length_b                   10.3616(9)
_cell_length_c                   22.821(2)
_cell_measurement_reflns_used    9873
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      72.21
_cell_measurement_theta_min      3.87
_cell_volume                     2269.2(4)
_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-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.994
_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           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0411
_diffrn_reflns_av_sigmaI/netI    0.0274
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            28155
_diffrn_reflns_theta_full        66.60
_diffrn_reflns_theta_max         72.20
_diffrn_reflns_theta_min         3.87
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.612
_exptl_absorpt_correction_T_max  0.8301
_exptl_absorpt_correction_T_min  0.556779
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.354
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.216
_refine_diff_density_min         -0.181
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.016(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         4412
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0278
_refine_ls_R_factor_gt           0.0258
_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^)+(0.0332P)^2^+0.4150P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0639
_refine_ls_wR_factor_ref         0.0657
_reflns_number_gt                4213
_reflns_number_total             4412
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo502776f_si_004.cif
_cod_data_source_block           s3663ma
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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 3143 2015-03-26 13:38:13Z robertas 

 Adding full bibliography for 4030927--4030929.cif.
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_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4030929