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_1506490
_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           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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.765(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.6380(11)
_cell_length_b                   8.2565(12)
_cell_length_c                   11.3453(16)
_cell_measurement_reflns_used    1293
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      26.61
_cell_measurement_theta_min      2.68
_cell_volume                     711.85(18)
_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 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0549
_diffrn_reflns_av_sigmaI/netI    0.0550
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3753
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         1.80
_exptl_absorpt_coefficient_mu    0.079
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.158
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             268
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.177
_refine_diff_density_min         -0.171
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.6(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.975
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     169
_refine_ls_number_reflns         2292
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.975
_refine_ls_R_factor_all          0.0620
_refine_ls_R_factor_gt           0.0532
_refine_ls_shift/su_max          0.033
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0823P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1324
_refine_ls_wR_factor_ref         0.1380
_reflns_number_gt                1859
_reflns_number_total             2292
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0478178si20041025_051225.cif
_cod_data_source_block           jmwmp1
_cod_depositor_comments
;
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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P2(1)   '
_cod_database_code               1506490