Synthetic studies towards furanocembrane diterpenes. A total synthesis of bis-deoxylophotoxin.
Cases, Manuel; Gonzalez-Lopez de Turiso, Felix; Hadjisoteriou, Maria S.; Pattenden, Gerald; Organic & biomolecular chemistry 3 (2005) 2786–2804; doi:10.1039/b504545b

data_7150174
_publ_section_title
;
 Synthetic studies towards furanocembrane diterpenes. A total synthesis
 of bis-deoxylophotoxin.
;
_journal_issue                   15
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2786
_journal_page_last               2804
_journal_paper_doi               10.1039/b504545b
_journal_volume                  3
_journal_year                    2005
_chemical_formula_moiety         'C22 H26 O6'
_chemical_formula_sum            'C22 H26 O6'
_chemical_formula_weight         386.43
_chemical_name_systematic
;
?
;
_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
_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                   6.565(4)
_cell_length_b                   8.698(5)
_cell_length_c                   34.72(2)
_cell_measurement_reflns_used    3656
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      22.4
_cell_measurement_theta_min      2.33
_cell_volume                     1983(2)
_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; PLATON (Spek, 2002)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Bruker SMART1k CCD area detector'
_diffrn_measurement_method       omega
_diffrn_radiation_monochromator  'silicon (111)'
_diffrn_radiation_source         'Daresbury Laboratory Station 9.8'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.6861
_diffrn_reflns_av_R_equivalents  0.062
_diffrn_reflns_av_sigmaI/netI    0.058
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            5116
_diffrn_reflns_theta_full        22.40
_diffrn_reflns_theta_max         22.40
_diffrn_reflns_theta_min         2.27
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.295
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.35
_refine_diff_density_min         -0.35
_refine_diff_density_rms         0.08
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -2(5)
_refine_ls_extinction_coef       0.014(5)
_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   1.09
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         1651
_refine_ls_number_restraints     73
_refine_ls_restrained_S_all      1.07
_refine_ls_R_factor_all          0.0982
_refine_ls_R_factor_gt           0.0878
_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^)+(0.095P)^2^+7.56P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.216
_refine_ls_wR_factor_ref         0.222
_reflns_number_gt                1456
_reflns_number_total             1651
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b504545b.txt
_cod_data_source_block           PONEST
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_atom_sites_solution_hydrogens' value 'geometrically placed' was
changed to 'geom'.

Automatic conversion script
Id: cif_fix_values 6452 2018-10-05 10:23:21Z andrius 
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_cod_database_code               7150174