A desymmetrization approach toward highly oxygenated cis-decalins.
Gromov, Alexey; Enev, Valentin; Mulzer, Johann; Organic letters 11 (2009) 2884–2886; doi:10.1021/ol900834c

data_1503963
_publ_section_title
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 A desymmetrization approach toward highly oxygenated cis-decalins.
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_journal_issue                   13
_journal_name_full               'Organic letters'
_journal_page_first              2884
_journal_page_last               2886
_journal_paper_doi               10.1021/ol900834c
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C20 H24 O5'
_chemical_formula_sum            'C20 H24 O5'
_chemical_formula_weight         344.39
_chemical_name_systematic
; 
(1aR,2R,3R,3aS,7aR,7bS)-3-(4-Methoxy-benzyloxy)-2-
methoxymethyl-1a,3,3a,7,7a,7b-hexahydro-2H-1-oxa-
cyclopropa[a]naphthalen-4-one
;
_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                   6.9194(2)
_cell_length_b                   7.8312(2)
_cell_length_c                   30.9251(9)
_cell_measurement_reflns_used    877
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.71
_cell_measurement_theta_min      5.20
_cell_volume                     1675.74(8)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker X8 APEXII CCD'
_diffrn_measurement_method       '\f- and \w-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  0.0465
_diffrn_reflns_av_sigmaI/netI    0.0167
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       43
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            117654
_diffrn_reflns_theta_full        30.10
_diffrn_reflns_theta_max         30.10
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.9789
_exptl_absorpt_correction_T_min  0.9668
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.365
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.282
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     226
_refine_ls_number_reflns         4901
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0339
_refine_ls_R_factor_gt           0.0310
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0521P)^2^+0.2770P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0810
_refine_ls_wR_factor_ref         0.0830
_reflns_number_gt                4625
_reflns_number_total             4901
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol900834c_si_001.cif
_cod_data_source_block           algr642
_cod_depositor_comments
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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      P212121
_cod_database_code               1503963