Rhodium(III)-catalyzed vinylic C-H activation: a direct route toward pyridinium salts.
Luo, Ching-Zong; Jayakumar, Jayachandran; Gandeepan, Parthasarathy; Wu, Yun-Ching; Cheng, Chien-Hong; Organic letters 17 (2015) 924–927; doi:10.1021/acs.orglett.5b00028

data_1554756
_publ_section_title
;
 Rhodium(III)-catalyzed vinylic C-H activation: a direct route toward
 pyridinium salts.
;
_journal_issue                   4
_journal_name_full               'Organic letters'
_journal_page_first              924
_journal_page_last               927
_journal_paper_doi               10.1021/acs.orglett.5b00028
_journal_volume                  17
_journal_year                    2015
_chemical_formula_moiety         'C26 H23 B F4 N2 O2'
_chemical_formula_sum            'C26 H23 B F4 N2 O2'
_chemical_formula_weight         482.27
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/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                 99.027(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2068(19)
_cell_length_b                   13.731(2)
_cell_length_c                   14.626(2)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     2421.1(6)
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_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  0.0406
_diffrn_reflns_av_sigmaI/netI    0.0519
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            16214
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_T_max  0.9958
_exptl_absorpt_correction_T_min  0.9605
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.323
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1000
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.410
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         4245
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.1044
_refine_ls_R_factor_gt           0.0605
_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^)+(0.0899P)^2^+1.2735P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1551
_refine_ls_wR_factor_ref         0.1851
_reflns_number_gt                2761
_reflns_number_total             4245
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b00028_si_004.cif
_cod_data_source_block           ch16688
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1554756