Highly chemoselective 2,4,5-triaryl-1,3-dioxolane formation from intermolecular 1,3-dipolar addition of carbonyl ylide with aryl aldehydes.
Lu, Chong-Dao; Chen, Zhi-Yong; Liu, Hui; Hu, Wen-Hao; Mi, Ai-Qiao; Organic letters 6 (2004) 3071–3074; doi:10.1021/ol0489494

data_1507051
_publ_section_title
;
 Highly chemoselective 2,4,5-triaryl-1,3-dioxolane formation from
 intermolecular 1,3-dipolar addition of carbonyl ylide with aryl
 aldehydes.
;
_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              3071
_journal_page_last               3074
_journal_paper_doi               10.1021/ol0489494
_journal_volume                  6
_journal_year                    2004
_chemical_formula_sum            'C27 H25 N O7'
_chemical_formula_weight         475.48
_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                 94.38(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.029(5)
_cell_length_b                   13.441(3)
_cell_length_c                   8.726(2)
_cell_measurement_reflns_used    31
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      13.77
_cell_measurement_theta_min      2.80
_cell_volume                     2459.2(10)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0138
_diffrn_reflns_av_sigmaI/netI    0.0722
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5155
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         1.80
_diffrn_standards_decay_%        2.93
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.284
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1000
_exptl_crystal_size_max          0.68
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.134
_refine_diff_density_min         -0.148
_refine_diff_density_rms         0.029
_refine_ls_extinction_coef       0.0087(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.810
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     321
_refine_ls_number_reflns         4452
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.810
_refine_ls_R_factor_all          0.0931
_refine_ls_R_factor_gt           0.0386
_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^)+(0.0268P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0666
_refine_ls_wR_factor_ref         0.0757
_reflns_number_gt                2135
_reflns_number_total             4452
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0489494si20040606_121019.cif
_cod_data_source_block           y1803
_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_cell_volume        2459.1(9)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1507051