A short biomimetic synthesis of the meroterpenoids guajadial and psidial A.
Lawrence, Andrew L.; Adlington, Robert M.; Baldwin, Jack E.; Lee, Victor; Kershaw, Jessica A.; Thompson, Amber L.; Organic letters 12 (2010) 1676–1679; doi:10.1021/ol100138k

data_1502867
_publ_section_title
;
 A short biomimetic synthesis of the meroterpenoids guajadial and psidial
 A.
;
_journal_issue                   8
_journal_name_full               'Organic letters'
_journal_page_first              1676
_journal_page_last               1679
_journal_paper_doi               10.1021/ol100138k
_journal_volume                  12
_journal_year                    2010
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C30 H34 O5'
_chemical_formula_sum            'C30 H34 O5'
_chemical_formula_weight         474.60
_chemical_melting_point          ?
_chemical_name_common            Guajadial
_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
_audit_creation_date             09-09-26
_audit_creation_method           CRYSTALS_ver_12.90
_cell_angle_alpha                90
_cell_angle_beta                 90.7342(10)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   6.5510(1)
_cell_length_b                   17.5144(4)
_cell_length_c                   10.7025(3)
_cell_measurement_reflns_used    2812
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      5
_cell_volume                     1227.87(5)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device       'Nonius KappaCCD'
_diffrn_measurement_device_type  Area
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.024
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            14655
_diffrn_reflns_theta_full        26.924
_diffrn_reflns_theta_max         27.474
_diffrn_reflns_theta_min         5.169
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.96
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            clear_pale_colourless
_exptl_crystal_density_diffrn    1.284
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             508
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         1.10
_refine_diff_density_min         -0.39
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9350
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         2264
_refine_ls_number_restraints     3
_refine_ls_R_factor_all          0.0772
_refine_ls_R_factor_gt           0.0689
_refine_ls_shift/su_max          0.0000990
_refine_ls_shift/su_mean         5.9457197
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 29.2 42.9 19.7 4.73 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1666
_refine_ls_wR_factor_gt          0.1575
_refine_ls_wR_factor_ref         0.1666
_reflns_limit_h_max              8
_reflns_limit_h_min              -8
_reflns_limit_k_max              22
_reflns_limit_k_min              0
_reflns_limit_l_max              13
_reflns_limit_l_min              0
_reflns_number_gt                1986
_reflns_number_total             2884
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.78
_oxford_diffrn_Wilson_scale      1.68
_oxford_refine_ls_r_factor_ref   0.0772
_oxford_refine_ls_scale          0.803(5)
_oxford_reflns_number_all        2264
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_oxford_structure_analysis_title 6153
_cod_data_source_file            ol100138k_si_002.cif
_cod_data_source_block           1
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

'_symmetry_cell_setting' value
'Monoclinic' changed to 'monoclinic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 1 21 1 '
_cod_database_code               1502867