Lewis acid catalyzed reaction of arylvinylidenecyclopropanes with acetals: a facile synthetic protocol for the preparation of indene derivatives.
Lu, Jian-Mei; Shi, Min; Organic letters 8 (2006) 5317–5320; doi:10.1021/ol062189a

data_1506271
_publ_section_title
;
 Lewis acid catalyzed reaction of arylvinylidenecyclopropanes with
 acetals: a facile synthetic protocol for the preparation of indene
 derivatives.
;
_journal_issue                   23
_journal_name_full               'Organic letters'
_journal_page_first              5317
_journal_page_last               5320
_journal_paper_doi               10.1021/ol062189a
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C38 H30'
_chemical_formula_weight         486.62
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 93.243(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.4196(16)
_cell_length_b                   11.1258(13)
_cell_length_c                   18.781(2)
_cell_measurement_reflns_used    1756
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      40.620
_cell_measurement_theta_min      4.759
_cell_volume                     2799.6(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0698
_diffrn_reflns_av_sigmaI/netI    0.0947
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            16162
_diffrn_reflns_theta_full        26.99
_diffrn_reflns_theta_max         26.99
_diffrn_reflns_theta_min         1.52
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.62122
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.155
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.487
_exptl_crystal_size_mid          0.435
_exptl_crystal_size_min          0.112
_refine_diff_density_max         0.163
_refine_diff_density_min         -0.184
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.830
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     349
_refine_ls_number_reflns         6079
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.830
_refine_ls_R_factor_all          0.1341
_refine_ls_R_factor_gt           0.0541
_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^)+(0.0601P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1276
_refine_ls_wR_factor_ref         0.1499
_reflns_number_gt                2578
_reflns_number_total             6079
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol062189asi20060905_031941.cif
_cod_data_source_block           cd26127
_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)/c
_cod_database_code               1506271