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_1505881
_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         'C19 H17 N O4 '
_chemical_formula_sum            'C19 H17 N O4'
_chemical_formula_weight         323.35
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_cell_angle_alpha                90
_cell_angle_beta                 35.698(6)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.051(2)
_cell_length_b                   20.060(4)
_cell_length_c                   11.469(2)
_cell_measurement_reflns_used    8023
_cell_measurement_temperature    223.1
_cell_measurement_theta_max      27.4
_cell_measurement_theta_min      3.0
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_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 0.9925
_diffrn_measured_fraction_theta_max 0.9943
_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  0.062
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            3806
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.48
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.991
_exptl_absorpt_correction_T_min  0.743
_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    1.327
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             680.00
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.43
_refine_diff_density_min         -0.42
_refine_ls_extinction_coef       76.8(1)
_refine_ls_extinction_method
'Larson (1970) Crystallographic Computing eq. 22'
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_refine_ls_hydrogen_treatment    refall
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_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[0.0001Fo^2^ + 0.7450\s^2^(Fo) + 0.2000]/(4Fo^2^)'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0790
_reflns_number_gt                1774
_reflns_number_total             3806
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
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_cod_data_source_block           '_Nk051214_________________'
_cod_original_cell_volume        1617.9(5)
_cod_original_formula_sum        'C19 H17 N O4 '
_cod_database_code               1505881