Synthesis of an analogue of the marine polypropionate tridachiahydropyrone.
Jeffery, David W.; Perkins, Michael V.; White, Jonathan M.; Organic letters 7 (2005) 407–409; doi:10.1021/ol0478178

data_1506489
_publ_section_title
;
 Synthesis of an analogue of the marine polypropionate
 tridachiahydropyrone.
;
_journal_issue                   3
_journal_name_full               'Organic letters'
_journal_page_first              407
_journal_page_last               409
_journal_paper_doi               10.1021/ol0478178
_journal_volume                  7
_journal_year                    2005
_chemical_formula_sum            'C15 H20 O3'
_chemical_formula_weight         248.31
_space_group_IT_number           20
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'C 2c 2'
_symmetry_space_group_name_H-M   'C 2 2 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.338(7)
_cell_length_b                   15.567(17)
_cell_length_c                   23.86(2)
_cell_measurement_reflns_used    402
_cell_measurement_theta_max      27.65
_cell_measurement_theta_min      2.62
_cell_volume                     2726(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and 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  0.2230
_diffrn_reflns_av_sigmaI/netI    0.2529
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            6932
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         1.71
_exptl_absorpt_coefficient_mu    0.083
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.210
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.238
_refine_diff_density_min         -0.352
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   5(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.930
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         2405
_refine_ls_number_restraints     0
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_refine_ls_R_factor_all          0.2614
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_refine_ls_shift/su_max          0.087
_refine_ls_shift/su_mean         0.013
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0924P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2152
_refine_ls_wR_factor_ref         0.2849
_reflns_number_gt                783
_reflns_number_total             2405
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0478178si20041025_051202.cif
_cod_data_source_block           jmwmp2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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 
;
_cod_original_sg_symbol_H-M      'C222(1) '
_cod_database_code               1506489