Construction of 3,6-Anhydrohexosides via Intramolecular Cyclization of Triflates and Its Application to the Synthesis of Natural Product Isolated from Leaves of Sauropus rostratus.
Liu, Long; Wang, Cheng-Qian; Liu, Dan; He, Wei-Gang; Xu, Jin-Yi; Lin, Ai-Jun; Yao, He-Quan; Tanabe, Genzoh; Muraoka, Osamu; Xie, Wei-Jia; Wu, Xiao-Ming; Organic letters 16 (2014) 5004–5007; doi:10.1021/ol5022838

data_1517934
_publ_section_title
;
 Construction of 3,6-Anhydrohexosides via Intramolecular Cyclization of
 Triflates and Its Application to the Synthesis of Natural Product
 Isolated from Leaves of Sauropus rostratus.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5004
_journal_page_last               5007
_journal_paper_doi               10.1021/ol5022838
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_sum            'C29 H32 O7'
_chemical_formula_weight         492.55
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 93.307(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.3830(11)
_cell_length_b                   10.0793(11)
_cell_length_c                   12.2195(13)
_cell_measurement_reflns_used    2424
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      67.15
_cell_measurement_theta_min      4.27
_cell_volume                     1276.7(2)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.977
_diffrn_measured_fraction_theta_max 0.977
_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  0.0261
_diffrn_reflns_av_sigmaI/netI    0.0332
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5061
_diffrn_reflns_theta_full        64.99
_diffrn_reflns_theta_max         64.99
_diffrn_reflns_theta_min         4.26
_exptl_absorpt_coefficient_mu    0.745
_exptl_absorpt_correction_T_max  0.8532
_exptl_absorpt_correction_T_min  0.8242
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.281
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             524
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.144
_refine_diff_density_min         -0.157
_refine_diff_density_rms         0.027
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.14(19)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     327
_refine_ls_number_reflns         2786
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0382
_refine_ls_R_factor_gt           0.0314
_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^)+(0.0627P)^2^+0.0450P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0879
_refine_ls_wR_factor_ref         0.0926
_reflns_number_gt                2552
_reflns_number_total             2786
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5022838_si_002.cif
_cod_data_source_block           cu_20140710cc_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/saulius/struct/COD-crude-data--automatic-downloads/current/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 2827 2014-09-09 07:05:25Z andrius 
;
_cod_original_sg_symbol_H-M      'P2(1)   '
_cod_database_code               1517934