A Unified Strategy for Enantioselective Total Synthesis of Cladiellin and Briarellin Diterpenes: Total Synthesis of Briarellins E and F and the Putative Structure of Alcyonin and Revision of Its Structure Assignment
Olivier Corminboeuf; Larry E. Overman; Lewis D. Pennington; Journal of Organic Chemistry 74 (2009) 5458–5470; doi:10.1021/jo9010156

data_4024730
_publ_section_title
;
A Unified Strategy for Enantioselective Total Synthesis of Cladiellin and
Briarellin Diterpenes: Total Synthesis of Briarellins E and F and the
Putative Structure of Alcyonin and Revision of Its Structure Assignment
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5458
_journal_page_last               5470
_journal_paper_doi               10.1021/jo9010156
_journal_volume                  74
_journal_year                    2009
_chemical_absolute_configuration syn
_chemical_formula_sum            'C10 H18 O2'
_chemical_formula_weight         170.24
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 95.7680(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.7017(9)
_cell_length_b                   5.9044(3)
_cell_length_c                   9.0335(5)
_cell_measurement_reflns_used    3580
_cell_measurement_temperature    163(2)
_cell_measurement_theta_max      28.29
_cell_measurement_theta_min      2.27
_cell_volume                     992.45(9)
_computing_cell_refinement       'Bruker SMART/SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      163(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0205
_diffrn_reflns_av_sigmaI/netI    0.0244
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            5369
_diffrn_reflns_theta_full        28.29
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         2.19
_diffrn_standards_decay_%        '< 1.0'
_diffrn_standards_interval_count 'initial 50 frames recollected'
_diffrn_standards_number         '50 frames'
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9878
_exptl_absorpt_correction_T_min  0.9765
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.139
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.263
_refine_diff_density_min         -0.144
_refine_diff_density_rms         0.033
_refine_ls_extinction_coef       0.004(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXTL
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     182
_refine_ls_number_reflns         2361
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.078
_refine_ls_R_factor_all          0.0354
_refine_ls_R_factor_gt           0.0318
_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^)+(0.0465P)^2^+0.1808P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0815
_refine_ls_wR_factor_ref         0.0838
_reflns_number_gt                2207
_reflns_number_total             2361
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo9010156_si_004.cif
_cod_data_source_block           leo107b
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 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:

'_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 
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_cod_original_sg_symbol_H-M      C2
_cod_database_code               4024730