Exploiting predisposition in the stereoselective synthesis of mono-, bi- and tetracyclic oxygen heterocycles: Equilibration between, and trapping of, alternative di- and tetraacetals
Bartlett, Stephen; Hodgson, Robert; Holland, Joanne M.; Jones, Matthew; Kilner, Colin; Nelson, Adam; Warriner, Stuart; Organic & Biomolecular Chemistry 1 (2003) 2393–; doi:10.1039/b303089j

data_7151436
_publ_section_title
;
 Exploiting predisposition in the stereoselective synthesis of mono-,
 bi- and tetracyclic oxygen heterocycles: Equilibration between, and
 trapping of, alternative di- and tetraacetals
;
_journal_issue                   13
_journal_name_full               'Organic &amp;  Biomolecular Chemistry'
_journal_page_first              2393
_journal_paper_doi               10.1039/b303089j
_journal_volume                  1
_journal_year                    2003
_chemical_formula_sum            'C18 H30 O8'
_chemical_formula_weight         374.42
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 91.161(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.7588(10)
_cell_length_b                   7.8904(4)
_cell_length_c                   13.1044(7)
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26
_cell_measurement_theta_min      2.29
_cell_volume                     1835.86(17)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector diffractometer'
_diffrn_measurement_method       'phi-omega 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  0.1062
_diffrn_reflns_av_sigmaI/netI    0.0697
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7982
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.29
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.355
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             808
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.359
_refine_diff_density_min         -0.340
_refine_diff_density_rms         0.078
_refine_ls_extinction_coef       0.009(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     123
_refine_ls_number_reflns         1795
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0680
_refine_ls_R_factor_gt           0.0481
_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^)+(0.0689P)^2^+1.1658P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1274
_refine_ls_wR_factor_ref         0.1395
_reflns_number_gt                1413
_reflns_number_total             1795
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b303089j.txt
_cod_data_source_block           jmh277
_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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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      C2/c
_cod_database_code               7151436