Total Syntheses of the Phytotoxic Lactones Herbarumin I and II and a Synthesis-Based Solution of the Pinolidoxin Puzzle
Alois Fürstner; Karin Radkowski; Conny Wirtz; Richard Goddard; Christian W. Lehmann; Richard Mynott; Journal of the American Chemical Society 124 (2002) 7061–7069; doi:10.1021/ja020238i

data_4114889
_publ_section_title
;
 Total Syntheses of the Phytotoxic Lactones Herbarumin I and II and a
 Synthesis-Based Solution of the Pinolidoxin Puzzle
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7061
_journal_page_last               7069
_journal_paper_doi               10.1021/ja020238i
_journal_volume                  124
_journal_year                    2002
_chemical_compound_source        'see paper'
_chemical_formula_sum            'C18 H27 O6.5'
_chemical_formula_weight         347.40
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      18
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.7888(7)
_cell_length_b                   18.5968(10)
_cell_length_c                   6.7764(3)
_cell_measurement_reflns_used    126879
_cell_measurement_temperature    100
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.00
_cell_volume                     1863.68(16)
_computing_cell_refinement       'Denzo / Scalepack (Otwinowski 1997)'
_computing_data_collection       'Collect software (Nonius, 1998)'
_computing_data_reduction        'Denzo / Scalepack (Otwinowski 1997)'
_computing_molecular_graphics    'ORTEP (Johnson, 1976)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       'CCD \w-scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         '0.3 mm rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1466
_diffrn_reflns_av_sigmaI/netI    0.1161
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            17859
_diffrn_reflns_theta_full        27.40
_diffrn_reflns_theta_max         27.40
_diffrn_reflns_theta_min         4.08
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0
_exptl_absorpt_correction_T_min  0
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       plate
_exptl_crystal_F_000             748
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.454
_refine_diff_density_min         -0.508
_refine_diff_density_rms         0.150
_refine_ls_abs_structure_details 'Flack, H. D. (1983). Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -4.0(19)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         4193
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.1422
_refine_ls_R_factor_gt           0.0777
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1627
_refine_ls_wR_factor_ref         0.1940
_reflns_number_gt                2745
_reflns_number_total             4193
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja020238i_3.cif
_cod_data_source_block           3992
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' 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_formula_sum        'C18 H27 O6.50'
_cod_database_code               4114889