Stereoselective rearrangement of guaianolides to tricyclic δ-valerolactones.
Schanderl, Martin; Jeong, Won Boo; Schwarz, Michael; Reiser, Oliver; Organic & biomolecular chemistry 9 (2011) 2543–2547; doi:10.1039/c0ob00919a

data_7151775
_publ_section_title
;
 Stereoselective rearrangement of guaianolides to tricyclic
 \d-valerolactones.
;
_journal_issue                   7
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2543
_journal_page_last               2547
_journal_paper_doi               10.1039/c0ob00919a
_journal_volume                  9
_journal_year                    2011
_chemical_absolute_configuration syn
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C16 H22 O4'
_chemical_formula_sum            'C16 H22 O4'
_chemical_formula_weight         278.34
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_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
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.9797(7)
_cell_length_b                   11.9507(9)
_cell_length_c                   17.3512(12)
_cell_measurement_reflns_used    8000
_cell_measurement_temperature    297
_cell_measurement_theta_max      26.94
_cell_measurement_theta_min      2.07
_cell_volume                     1447.3(2)
_computing_cell_refinement       'STOE (1998)'
_computing_data_collection       'STOE (1998)'
_computing_data_reduction        'STOE (1998)'
_computing_molecular_graphics    'PLATON (Spek, 1990)'
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-97 (Altomare, 1999)'
_diffrn_ambient_temperature      297(1)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'STOE-IPDS diffractometer'
_diffrn_measurement_method       rotation
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0292
_diffrn_reflns_av_sigmaI/netI    0.0277
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            12883
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        26.94
_diffrn_reflns_theta_max         26.94
_diffrn_reflns_theta_min         2.07
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.966
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'translucent colourless'
_exptl_crystal_density_diffrn    1.277
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.380
_exptl_crystal_size_mid          0.320
_exptl_crystal_size_min          0.160
_refine_diff_density_max         0.261
_refine_diff_density_min         -0.234
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details 'Flack H.D. (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.3(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.958
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     181
_refine_ls_number_reflns         3128
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.958
_refine_ls_R_factor_all          0.0515
_refine_ls_R_factor_gt           0.0415
_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^)+(0.0772P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1041
_refine_ls_wR_factor_ref         0.1087
_reflns_number_gt                2566
_reflns_number_total             3128
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c0ob00919a.txt
_cod_data_source_block           i198
_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 1555 2011-01-17 13:19:09Z saulius 
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_cod_database_code               7151775