Electroreductive intramolecular coupling of aromatic imino esters: is four-membered cyclization much more favorable than six-membered cyclization?
Kise, Naoki; Hirano, Yuuki; Tanaka, Yoshi; Organic letters 8 (2006) 1323–1325; doi:10.1021/ol053144x

data_1505879
_publ_section_title
;
 Electroreductive intramolecular coupling of aromatic imino esters: is
 four-membered cyclization much more favorable than six-membered
 cyclization?
;
_journal_issue                   7
_journal_name_full               'Organic letters'
_journal_page_first              1323
_journal_page_last               1325
_journal_paper_doi               10.1021/ol053144x
_journal_volume                  8
_journal_year                    2006
_chemical_formula_moiety         'C24 H31 N O5 Si '
_chemical_formula_sum            'C24 H31 N O5 Si'
_chemical_formula_weight         441.60
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_cell_angle_alpha                98.051(6)
_cell_angle_beta                 100.63(1)
_cell_angle_gamma                109.27(1)
_cell_formula_units_Z            2
_cell_length_a                   9.062(2)
_cell_length_b                   11.895(3)
_cell_length_c                   12.311(3)
_cell_measurement_reflns_used    2425
_cell_measurement_temperature    223.1
_cell_measurement_theta_max      27.4
_cell_measurement_theta_min      3.3
_cell_volume                     1202.0(5)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        CrystalStructure
_computing_publication_material  'CrystalStructure Ver. 3.00'
_computing_structure_refinement  CRYSTALS
_computing_structure_solution    SIR92
_diffrn_detector_area_resol_mean 10.00
_diffrn_measured_fraction_theta_full 0.9844
_diffrn_measured_fraction_theta_max 0.9867
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.021
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            5430
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.48
_exptl_absorpt_coefficient_mu    0.131
_exptl_absorpt_correction_T_max  0.974
_exptl_absorpt_correction_T_min  0.799
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
    Higashi, T. (1995). Program for Absorption Correction.
    Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.220
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             472.00
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.34
_refine_diff_density_min         -0.37
_refine_ls_extinction_coef       173.5(2)
_refine_ls_extinction_method
'Larson (1970) Crystallographic Computing eq. 22'
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    refall
_refine_ls_number_parameters     312
_refine_ls_number_reflns         5419
_refine_ls_R_factor_gt           0.0450
_refine_ls_shift/su_max          0.0000
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
'w = 1/[0.0004Fo^2^ + 2.6900\s^2^(Fo) + 0.5000]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0490
_reflns_number_gt                3843
_reflns_number_total             5430
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            ol053144xsi20051228_044116.cif
_cod_data_source_block           '_Nk051201_________________'
_cod_original_sg_symbol_H-M      'P -1       '
_cod_original_formula_sum        'C24 H31 N O5 Si '
_cod_database_code               1505879