The Naturally Occurring Ketene Acetal Benesudon: Total Synthesis and Assignment of Relative and Absolute Stereochemistry
Derrick L. J. Clive; Minaruzzaman; Haikang Yang; Journal of Organic Chemistry 73 (2008) 6743–6752; doi:10.1021/jo801028y

data_4023645
_publ_contact_author_address
; Department of Chemistry
  University of Alberta
  Edmonton, Alberta T6G 2G2
  Canada
;
_publ_contact_author_email       derrick.clive@ualberta.ca
_publ_contact_author_fax         1(780)4928231
_publ_contact_author_name        'Dr. Derrick L. J. Clive'
_publ_contact_author_phone       1(780)4923251
_publ_section_title
;
 The Naturally Occurring Ketene Acetal Benesudon: Total Synthesis
 and Assignment of Relative and Absolute Stereochemistry
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6743
_journal_page_last               6752
_journal_paper_doi               10.1021/jo801028y
_journal_volume                  73
_journal_year                    2008
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C16 H28 O4'
_chemical_formula_sum            'C16 H28 O4'
_chemical_formula_weight         284.38
_chemical_name_systematic
6-heptyl-5-methyl-3-methylenehexahydro-4H-furo[2,3-b]pyran-4,5-diol
_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                 92.815(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.5158(7)
_cell_length_b                   6.7186(8)
_cell_length_c                   21.890(3)
_cell_measurement_reflns_used    3239
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      26.35
_cell_measurement_theta_min      2.79
_cell_volume                     810.23(17)
_computing_cell_refinement       'Bruker SAINT (Bruker, 1997)'
_computing_data_collection       'Bruker SMART (Bruker, 1997)'
_computing_data_reduction        'Bruker SAINT (Bruker, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL (Bruker, 1997)'
_computing_publication_material  'Bruker SHELXTL (Bruker, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type
'Bruker PLATFORM diffractometer/SMART 1000 CCD area detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0507
_diffrn_reflns_av_sigmaI/netI    0.0825
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            5853
_diffrn_reflns_theta_full        26.43
_diffrn_reflns_theta_max         26.43
_diffrn_reflns_theta_min         0.93
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.9967
_exptl_absorpt_correction_T_min  0.9704
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.166
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.333
_refine_diff_density_min         -0.307
_refine_diff_density_rms         0.106
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(17)
_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     180
_refine_ls_number_reflns         3300
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0940
_refine_ls_R_factor_gt           0.0663
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0989P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1584
_refine_ls_wR_factor_ref         0.1771
_reflns_number_gt                2474
_reflns_number_total             3300
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo801028y-file001.cif
_cod_data_source_block           111
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4023645