Rapid Access to Substituted Piperazines via Ti(NMe2)4-Mediated C‒C Bond-Making Reactions
Chen, Zhou; Wu, Jian; Chen, Yanmei; Li, Lei; Xia, Yuanzhi; Li, Yahong; Liu, Wei; Lei, Tao; Yang, Lijuan; Gao, Dandan; Li, Wu; Organometallics 31 (2012) 6005–; doi:10.1021/om300022u

data_4078983
_publ_section_title
;
 Rapid Access to Substituted Piperazines via Ti(NMe2)4-Mediated C--C
 Bond-Making Reactions
;
_journal_issue                   17
_journal_name_full               Organometallics
_journal_page_first              6005
_journal_paper_doi               10.1021/om300022u
_journal_volume                  31
_journal_year                    2012
_chemical_formula_moiety         'C26 H22 N4 O2, 2(C2 H6 O)'
_chemical_formula_sum            'C30 H34 N4 O4'
_chemical_formula_weight         514.61
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 97.229(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.9343(11)
_cell_length_b                   5.9347(5)
_cell_length_c                   20.2950(18)
_cell_measurement_reflns_used    638
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      16.19
_cell_measurement_theta_min      3.30
_cell_volume                     1426.0(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0400
_diffrn_reflns_av_sigmaI/netI    0.0244
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            4093
_diffrn_reflns_theta_full        16.44
_diffrn_reflns_theta_max         16.44
_diffrn_reflns_theta_min         1.88
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.9856
_exptl_absorpt_correction_T_min  0.9801
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.199
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             548
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.316
_refine_diff_density_min         -0.183
_refine_diff_density_rms         0.033
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     175
_refine_ls_number_reflns         760
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0595
_refine_ls_R_factor_gt           0.0481
_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^)+(0.0717P)^2^+2.0715P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1268
_refine_ls_wR_factor_ref         0.1370
_reflns_number_gt                613
_reflns_number_total             760
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om300022u_si_003.cif
_cod_data_source_block           7
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4078983