Highly Asymmetric Intramolecular Cyclopropanation of Acceptor-Substituted Diazoacetates by Co(II)-Based Metalloradical Catalysis: Iterative Approach for Development of New-Generation Catalysts
Xue Xu; Hongjian Lu; Joshua V. Ruppel; Xin Cui; Silke Lopez de Mesa; Lukasz Wojtas; X. Peter Zhang; Journal of the American Chemical Society 133 (2011) 15292–15295; doi:10.1021/ja2062506

data_4106878
_publ_section_title
;
 Highly Asymmetric Intramolecular Cyclopropanation of Acceptor-Substituted
 Diazoacetates by Co(II)-Based Metalloradical Catalysis: Iterative
 Approach for Development of New-Generation Catalysts
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15292
_journal_page_last               15295
_journal_paper_doi               10.1021/ja2062506
_journal_volume                  133
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C14 H11 N O2'
_chemical_formula_sum            'C14 H11 N O2'
_chemical_formula_weight         225.24
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.8667(2)
_cell_length_b                   8.8242(2)
_cell_length_c                   21.4253(5)
_cell_measurement_reflns_used    5202
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      66.96
_cell_measurement_theta_min      4.11
_cell_volume                     1109.16(5)
_computing_cell_refinement       'APEX2 (Bruker, 2010); SAINT (Bruker, 2009)'
_computing_data_collection       'APEX2 (Bruker, 2010)'
_computing_data_reduction        'SAINT (Bruker, 2009);XPREP(Sheldrick,2008)'
_computing_publication_material  'APEX2 (Bruker, 2010)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'BRUKER SMART APEXII CCD'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0277
_diffrn_reflns_av_sigmaI/netI    0.0187
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            9561
_diffrn_reflns_theta_full        67.56
_diffrn_reflns_theta_max         67.56
_diffrn_reflns_theta_min         4.13
_exptl_absorpt_coefficient_mu    0.738
_exptl_absorpt_correction_T_max  0.9854
_exptl_absorpt_correction_T_min  0.8664
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; (Sheldrick, 2003)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.349
_exptl_crystal_description       needle
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.199
_refine_diff_density_min         -0.153
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.2(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     154
_refine_ls_number_reflns         1972
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0336
_refine_ls_R_factor_gt           0.0328
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0558P)^2^+0.2704P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0886
_refine_ls_wR_factor_ref         0.0892
_reflns_number_gt                1925
_reflns_number_total             1972
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja2062506_si_004.cif
_cod_data_source_block           2n
_cod_original_cell_volume        1109.17(5)
_cod_database_code               4106878