Synthesis of 2-aminopyridines via ruthenium-catalyzed [2+2+2] cycloaddition of 1,6- and 1,7-diynes with cyanamides: scope and limitations
Ye, Fei; Boukattaya, Fatma; Haddad, Mansour; Ratovelomanana-Vidal, Virginie; Michelet, Véronique; New Journal of Chemistry 42 (2018) 3222–; doi:10.1039/C7NJ04933A

data_7056968
_publ_section_title
;
 Synthesis of 2-aminopyridines via ruthenium-catalyzed [2+2+2]
 cycloaddition of 1,6- and 1,7-diynes with cyanamides: scope and
 limitations
;
_journal_issue                   5
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              3222
_journal_paper_doi               10.1039/C7NJ04933A
_journal_volume                  42
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C30 H38 N2 O3'
_chemical_formula_sum            'C30 H38 N2 O3'
_chemical_formula_weight         474.62
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_block_doi                 10.5517/ccdc.csd.cc1pbl3q
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-06-29 deposited with the CCDC.
2018-01-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.1178(2)
_cell_length_b                   17.9132(5)
_cell_length_c                   19.8302(6)
_cell_measurement_reflns_used    7252
_cell_measurement_temperature    200(1)
_cell_measurement_theta_max      66.67
_cell_measurement_theta_min      4.94
_cell_volume                     2528.40(13)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'SXGRAPH (Farrugia, 2012)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT-2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      200(1)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_source         micro-source
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0610
_diffrn_reflns_av_unetI/netI     0.0667
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            12297
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        66.500
_diffrn_reflns_theta_max         66.669
_diffrn_reflns_theta_min         3.325
_exptl_absorpt_coefficient_mu    0.630
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.788
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
R.H. Blessing, Acta Cryst. (1995), A51, 33-38
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.247
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.6
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.178
_refine_diff_density_min         -0.195
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details
;
 Flack x determined using 1774 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.12(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     318
_refine_ls_number_reflns         4468
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0421
_refine_ls_R_factor_gt           0.0405
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0536P)^2^+0.1366P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0983
_refine_ls_wR_factor_ref         0.0998
_reflns_Friedel_coverage         0.739
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.996
_reflns_number_gt                4282
_reflns_number_total             4468
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7nj04933a2.cif
_cod_data_source_block           paper
_cod_depositor_comments
'Adding full bibliography for 7056967--7056968.cif.'
_cod_database_code               7056968
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              63204