Atom-Economical Synthesis of N-Heterocycles via Cascade Inter-/Intramolecular C-N Bond-Forming Reactions Catalyzed by Ti Amides
Hao Shen; Zuowei Xie; Journal of the American Chemical Society 132 (2010) 11473–11480; doi:10.1021/ja101796k

data_4102859
_publ_section_title
;
 Atom-Economical Synthesis of N-Heterocycles via Cascade
 Inter-/Intramolecular C-N Bond-Forming Reactions Catalyzed by Ti Amides
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11473
_journal_page_last               11480
_journal_paper_doi               10.1021/ja101796k
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C20 H20 N2'
_chemical_formula_weight         288.38
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 100.7460(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   20.1718(6)
_cell_length_b                   5.8933(2)
_cell_length_c                   27.0472(8)
_cell_measurement_temperature    296(2)
_cell_volume                     3158.94(17)
_computing_cell_refinement       'BRUKER APEXII CCD DIFFRACTOMETER'
_computing_data_collection       'BRUKER APEXII CCD DIFFRACTOMETER'
_computing_data_reduction        'BRUKER APEXII CCD DIFFRACTOMETER'
_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 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'BRUKER APEXII CCD DIFFRACTOMETER'
_diffrn_measurement_method       'OMEGA SCAN'
_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  0.0208
_diffrn_reflns_av_sigmaI/netI    0.0213
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -3
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            16030
_diffrn_reflns_theta_full        28.31
_diffrn_reflns_theta_max         28.31
_diffrn_reflns_theta_min         1.53
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.853061
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.213
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1232
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.266
_refine_diff_density_min         -0.267
_refine_diff_density_rms         0.032
_refine_ls_extinction_coef       0.0020(6)
_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   1.013
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         3888
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.1032
_refine_ls_R_factor_gt           0.0583
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1002P)^2^+1.4690P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1733
_refine_ls_wR_factor_ref         0.2170
_reflns_number_gt                2189
_reflns_number_total             3888
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja101796k_si_002_3.cif
_cod_data_source_block           5c
_cod_database_code               4102859