Brønsted acid-promoted glycosylations of disaccharide glycal substructures of the saccharomicins.
Balthaser, Bradley R.; McDonald, Frank E.; Organic letters 11 (2009) 4850–4853; doi:10.1021/ol901923x

data_1504200
_publ_section_title
;
 Br\/onsted acid-promoted glycosylations of disaccharide glycal
 substructures of the saccharomicins.
;
_journal_issue                   21
_journal_name_full               'Organic letters'
_journal_page_first              4850
_journal_page_last               4853
_journal_paper_doi               10.1021/ol901923x
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C22 H35 N O11'
_chemical_formula_sum            'C22 H35 N O11'
_chemical_formula_weight         489.51
_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                   8.1737(7)
_cell_length_b                   10.9997(8)
_cell_length_c                   29.222(2)
_cell_measurement_reflns_used    2341
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      60.19
_cell_measurement_theta_min      3.02
_cell_volume                     2627.3(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.882
_diffrn_measured_fraction_theta_max 0.882
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0230
_diffrn_reflns_av_sigmaI/netI    0.0331
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            7946
_diffrn_reflns_theta_full        64.46
_diffrn_reflns_theta_max         64.46
_diffrn_reflns_theta_min         3.02
_exptl_absorpt_coefficient_mu    0.840
_exptl_absorpt_correction_T_max  0.9752
_exptl_absorpt_correction_T_min  0.8175
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.10, Sheldrick 2003'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1048
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.482
_refine_diff_density_min         -0.147
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         3685
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0515
_refine_ls_R_factor_gt           0.0404
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0614P)^2^+0.3928P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0995
_refine_ls_wR_factor_ref         0.1071
_reflns_number_gt                3148
_reflns_number_total             3685
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol901923x_si_004.cif
_cod_data_source_block           b0673bs
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1504200