Total synthesis of norcembrenolide B and scabrolide D.
Saitman, Alec; Rulliere, Pauline; Sullivan, Steven D. E.; Theodorakis, Emmanuel A.; Organic letters 13 (2011) 5854–5857; doi:10.1021/ol202476j

data_1502558
_publ_section_title
;
 Total synthesis of norcembrenolide B and scabrolide D.
;
_journal_issue                   21
_journal_name_full               'Organic letters'
_journal_page_first              5854
_journal_page_last               5857
_journal_paper_doi               10.1021/ol202476j
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C19 H22 O4'
_chemical_formula_weight         314.37
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                80.523(9)
_cell_angle_beta                 86.191(9)
_cell_angle_gamma                86.070(9)
_cell_formula_units_Z            4
_cell_length_a                   6.4340(7)
_cell_length_b                   14.8481(16)
_cell_length_c                   16.841(2)
_cell_measurement_reflns_used    1922
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      63.88
_cell_measurement_theta_min      2.66
_cell_volume                     1580.7(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 0.918
_diffrn_measured_fraction_theta_max 0.854
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0446
_diffrn_reflns_av_sigmaI/netI    0.0872
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            6874
_diffrn_reflns_theta_full        60.00
_diffrn_reflns_theta_max         64.59
_diffrn_reflns_theta_min         2.66
_exptl_absorpt_coefficient_mu    0.744
_exptl_absorpt_correction_T_max  0.9638
_exptl_absorpt_correction_T_min  0.8359
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             672
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.326
_refine_diff_density_rms         0.069
_refine_ls_extinction_coef       'not measured'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     421
_refine_ls_number_reflns         4563
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.1159
_refine_ls_R_factor_gt           0.0662
_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^)+(0.0858P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1539
_refine_ls_wR_factor_ref         0.1782
_reflns_number_gt                2829
_reflns_number_total             4563
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol202476j_si_004.cif
_cod_data_source_block           Theod51
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_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
_cod_database_code               1502558