Iron-Catalyzed Formation of 2-Aminopyridines from Diynes and Cyanamides
Timothy K. Lane; Brendan R. D'Souza; Janis Louie; Journal of Organic Chemistry 77 (2012) 7555–7563; doi:10.1021/jo3012418

data_4027458
_publ_section_title
;
 Iron-Catalyzed Formation of 2-Aminopyridines from Diynes and Cyanamides
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              7555
_journal_page_last               7563
_journal_paper_doi               10.1021/jo3012418
_journal_volume                  77
_journal_year                    2012
_chemical_formula_moiety         'C23 H25 N3 O2 S'
_chemical_formula_sum            'C23 H25 N3 O2 S'
_chemical_formula_weight         407.52
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 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                 94.2098(19)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.3020(3)
_cell_length_b                   9.9176(3)
_cell_length_c                   20.2026(8)
_cell_measurement_reflns_used    4251
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      26.373
_cell_measurement_theta_min      1.018
_cell_volume                     2058.55(12)
_computing_cell_refinement       DENZO-SMN
_computing_data_collection       'Nonius COLLECT'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    'WinGX, Ortep3'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR97
_diffrn_ambient_temperature      150(1)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Nonius KappaCCD Diffractometer'
_diffrn_measurement_method       'Phi and 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  0.0415
_diffrn_reflns_av_sigmaI/netI    0.0547
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            7782
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.29
_exptl_absorpt_coefficient_mu    0.182
_exptl_absorpt_correction_T_max  0.9856
_exptl_absorpt_correction_T_min  0.9508
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO-SMN (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.315
_exptl_crystal_description       plate
_exptl_crystal_F_000             864
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.231
_refine_diff_density_min         -0.415
_refine_diff_density_rms         0.056
_refine_ls_extinction_coef       0.0035(9)
_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   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     267
_refine_ls_number_reflns         4181
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0828
_refine_ls_R_factor_gt           0.0511
_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^)+(0.0529P)^2^+1.2362P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1167
_refine_ls_wR_factor_ref         0.1317
_reflns_number_gt                2941
_reflns_number_total             4181
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo3012418_si_003.cif
_cod_data_source_block           jl049
_cod_original_sg_symbol_H-M      'P 21/a'
_cod_database_code               4027458