Synthesis of the mycolactone core by ring-closing metathesis
Alexander, Matthew D.; Fontaine, Shaun D.; La Clair, James J.; DiPasquale, Antonio G.; Rheingold, Arnold L.; Burkart, Michael D.; Chemical Communications (Cambridge, United Kingdom)  (2006) 4602–4604; doi:10.1039/b609408b

data_7101524
_publ_section_title
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 Synthesis of the mycolactone core by ring-closing metathesis
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   44
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              4602
_journal_page_last               4604
_journal_paper_doi               10.1039/b609408b
_journal_year                    2006
_chemical_absolute_configuration ad
_chemical_formula_sum            'C24 H44 O4 Si'
_chemical_formula_weight         424.68
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 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            4
_cell_length_a                   7.6150(9)
_cell_length_b                   13.9000(17)
_cell_length_c                   23.912(3)
_cell_measurement_reflns_used    9027
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.16
_cell_measurement_theta_min      2.81
_cell_volume                     2531.0(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    ORTEP-32
_computing_publication_material  WinGX
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-2004
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0490
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            4449
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.25
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_T_max  0.9918
_exptl_absorpt_correction_T_min  0.9769
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.114
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             936
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.311
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.05(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.230
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4449
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.230
_refine_ls_R_factor_all          0.0658
_refine_ls_R_factor_gt           0.0604
_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^)+(0.0183P)^2^+1.7857P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1021
_refine_ls_wR_factor_ref         0.1037
_reflns_number_gt                4159
_reflns_number_total             4449
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b609408b.txt
_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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7101524