Stereocontrolled synthesis of contiguous C(sp3)-C(aryl) bonds by lanthanide(III)-catalyzed domino aryl-Claisen [3,3]-sigmatropic rearrangements.
Ramadhar, Timothy R.; Kawakami, Jun-ichi; Lough, Alan J.; Batey, Robert A.; Organic letters 12 (2010) 4446–4449; doi:10.1021/ol1018147

data_1503209
_publ_section_title
;
 Stereocontrolled synthesis of contiguous C(sp3)-C(aryl) bonds by
 lanthanide(III)-catalyzed domino aryl-Claisen [3,3]-sigmatropic
 rearrangements.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              4446
_journal_page_last               4449
_journal_paper_doi               10.1021/ol1018147
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C18 H16 N2 O6'
_chemical_formula_sum            'C18 H16 N2 O6'
_chemical_formula_weight         356.33
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 108.846(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.3276(9)
_cell_length_b                   9.2926(6)
_cell_length_c                   11.4092(6)
_cell_measurement_reflns_used    5097
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.7
_cell_volume                     1638.27(17)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius B.V., 1997-2002)'
_computing_data_reduction        Denzo-SMN
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXTL V6.1'
_computing_structure_refinement  'SHELXTL V6.1 (Sheldrick, 2008)'
_computing_structure_solution    'SIR-92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f scans and \w scans with \k offsets'
_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  0.0521
_diffrn_reflns_av_sigmaI/netI    0.0545
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5097
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.56
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.815
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.445
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.279
_refine_diff_density_min         -0.348
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     144
_refine_ls_number_reflns         1858
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.060
_refine_ls_R_factor_all          0.0910
_refine_ls_R_factor_gt           0.0547
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0876P)^2^+0.3155P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1347
_refine_ls_wR_factor_ref         0.1595
_reflns_number_gt                1239
_reflns_number_total             1858
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ol1018147_si_003.cif
_cod_data_source_block           k08290
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1638.27(16)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               1503209