Total Synthesis of (+)-Schweinfurthins B and E
Joseph J. Topczewski; Jeffrey D. Neighbors; David F. Wiemer; Journal of Organic Chemistry 74 (2009) 6965–6972; doi:10.1021/jo901161m

data_4024843
_publ_section_title
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Total Synthesis of (+)-Schweinfurthins B and E
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6965
_journal_page_last               6972
_journal_paper_doi               10.1021/jo901161m
_journal_volume                  74
_journal_year                    2009
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C18 H22 O4'
_chemical_formula_sum            'C18 H22 O4'
_chemical_formula_weight         302.36
_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
_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            8
_cell_length_a                   9.6995(10)
_cell_length_b                   11.1496(11)
_cell_length_c                   29.233(3)
_cell_measurement_reflns_used    9096
_cell_measurement_temperature    190(2)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      1.0
_cell_volume                     3161.4(6)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo, Scalepack (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL v5.1 (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL v5.1 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXTL v5.1 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXTL v5.1 (Sheldrick, 1997)'
_diffrn_ambient_temperature      190(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD phi and 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  0.0777
_diffrn_reflns_av_sigmaI/netI    0.0509
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            28607
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.0
_diffrn_reflns_theta_min         2.2
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.9973
_exptl_absorpt_correction_T_min  0.9662
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'HKL Scalepack (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1296
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.187
_refine_diff_density_min         -0.158
_refine_diff_density_rms         0.036
_refine_ls_extinction_coef       0.0027(4)
_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   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     413
_refine_ls_number_reflns         3171
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0705
_refine_ls_R_factor_gt           0.0380
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0358P)^2^+0.2733P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0700
_refine_ls_wR_factor_ref         0.0796
_reflns_number_gt                2314
_reflns_number_total             3171
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo901161m_si_001.cif
_cod_data_source_block           wie31
_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 
;
_cod_original_sg_symbol_H-M      'P 2(1) 2(1) 2(1)'
_cod_database_code               4024843