Synthesis of labdane diterpenes galanal a and B from (+)-sclareolide.
Kumar, Chebolu Naga Sesha Sai Pavan; Chein, Rong-Jie; Organic letters 16 (2014) 2990–2992; doi:10.1021/ol501121v

data_1515976
_publ_section_title
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 Synthesis of labdane diterpenes galanal a and B from (+)-sclareolide.
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_journal_issue                   11
_journal_name_full               'Organic letters'
_journal_page_first              2990
_journal_page_last               2992
_journal_paper_doi               10.1021/ol501121v
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C21 H32 O4'
_chemical_formula_sum            'C21 H32 O4'
_chemical_formula_weight         348.47
_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
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 102.108(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   6.0539(2)
_cell_length_b                   11.5542(4)
_cell_length_c                   13.5149(5)
_cell_measurement_reflns_used    5139
_cell_measurement_temperature    100.00(10)
_cell_measurement_theta_max      29.81
_cell_measurement_theta_min      2.34
_cell_volume                     924.31(6)
_computing_cell_refinement       'Bruker APEX2'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100.00(10)
_diffrn_measured_fraction_theta_full 1
_diffrn_measured_fraction_theta_max 1
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0634
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_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            14983
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         27.09
_diffrn_reflns_theta_min         1.54
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9949
_exptl_absorpt_correction_T_min  0.9685
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS, 1996'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       thin
_exptl_crystal_F_000             380
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.207
_refine_diff_density_min         -0.192
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.6(10)
_refine_ls_extinction_coef       0.014(2)
_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   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         4068
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0597
_refine_ls_R_factor_gt           0.0406
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0387P)^2^+0.0597P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0801
_refine_ls_wR_factor_ref         0.0875
_reflns_number_gt                3317
_reflns_number_total             4068
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol501121v_si_002.cif
_cod_data_source_block           i14185
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 1515976.cif.

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 
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_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1515976