Hydride-induced novel cyclization of dienedinitriles leading to multifunctionalized cyclopentadienes.
Zhang, Hui-Jun; Meng, Tianhao; Demerseman, Bernard; Bruneau, Christian; Xi, Zhenfeng; Organic letters 11 (2009) 4458–4461; doi:10.1021/ol901840c

data_1504174
_publ_section_title
;
 Hydride-induced novel cyclization of dienedinitriles leading to
 multifunctionalized cyclopentadienes.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              4458
_journal_page_last               4461
_journal_paper_doi               10.1021/ol901840c
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C24 H22 Br2 N4 O3, C7 H7 Br N2 O'
_chemical_formula_sum            'C31 H29 Br3 N6 O4'
_chemical_formula_weight         789.33
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                82.36(3)
_cell_angle_beta                 88.14(3)
_cell_angle_gamma                72.95(3)
_cell_formula_units_Z            2
_cell_length_a                   10.299(2)
_cell_length_b                   12.584(3)
_cell_length_c                   12.776(3)
_cell_measurement_reflns_used    457
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.17
_cell_volume                     1568.9(7)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics    'XP in Siemens SHELXTL (Sheldrick, 1994)'
_computing_publication_material  'SHELX97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0397
_diffrn_reflns_av_sigmaI/netI    0.0443
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            19363
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.63
_exptl_absorpt_coefficient_mu    3.904
_exptl_absorpt_correction_T_max  0.6734
_exptl_absorpt_correction_T_min  0.5921
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2008)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.671
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             788
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.815
_refine_diff_density_min         -0.455
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.144
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     397
_refine_ls_number_reflns         7157
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.144
_refine_ls_R_factor_all          0.0672
_refine_ls_R_factor_gt           0.0551
_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^)+(0.0340P)^2^+1.8212P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1062
_refine_ls_wR_factor_ref         0.1118
_reflns_number_gt                6141
_reflns_number_total             7157
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol901840c_si_004.cif
_cod_data_source_block           sa235
_cod_original_cell_volume        1568.9(6)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1504174