Acid-catalyzed tandem reaction for the synthesis of pyridine derivatives via CC/C(sp3)–N bond cleavage of enones and primary amines
Mao, Zhong-Yuan; Liao, Xiao-Yun; Wang, Heng-Shan; Wang, Chun-Gu; Huang, Ke-Bin; Pan, Ying-Ming; RSC Adv. 7 (2017) 13123–; doi:10.1039/C7RA00780A

data_7227774
_publ_section_title
;
 Acid-catalyzed tandem reaction for the synthesis of pyridine derivatives
 via C&#xE001;C/C(sp3)--N bond cleavage of enones and primary amines
;
_journal_issue                   22
_journal_name_full               'RSC Adv.'
_journal_page_first              13123
_journal_paper_doi               10.1039/C7RA00780A
_journal_volume                  7
_journal_year                    2017
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C23 H17 N'
_chemical_formula_sum            'C23 H17 N'
_chemical_formula_weight         307.38
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2016-07-25
_audit_creation_method
;
Olex2 1.2
(compiled 2016.02.19 svn.r3266 for OlexSys, GUI svn.r5155)
;
_audit_update_record
;
2016-08-07 deposited with the CCDC.
2017-02-20 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.521(4)
_cell_length_b                   19.628(9)
_cell_length_c                   11.313(5)
_cell_measurement_reflns_used    8339
_cell_measurement_temperature    296.15
_cell_measurement_theta_max      26.26
_cell_measurement_theta_min      2.71
_cell_volume                     1670.0(14)
_computing_cell_refinement       'SAINT v8.27A (Bruker, 2012)'
_computing_data_reduction        'SAINT v8.27A (Bruker, 2012)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XH (Sheldrick, 2008)'
_computing_structure_solution    'XS (Sheldrick, 2008)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0291
_diffrn_reflns_av_unetI/netI     0.0245
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            17049
_diffrn_reflns_theta_full        26.33
_diffrn_reflns_theta_max         26.33
_diffrn_reflns_theta_min         2.08
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  0.9916
_exptl_absorpt_correction_T_min  0.9716
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.223
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.161
_refine_diff_density_min         -0.163
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3392
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0477
_refine_ls_R_factor_gt           0.0404
_refine_ls_shift/su_max          0.157
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0554P)^2^+0.2430P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1058
_refine_ls_wR_factor_ref         0.1128
_reflns_number_gt                3020
_reflns_number_total             3392
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ra00780a2.cif
_cod_data_source_block           aaaa
_cod_database_code               7227774
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 1(4) 0(4)
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
3. Rigid bond restraints
 C10, C15
 with sigma for 1-2 distances of 0.0002 and sigma for 1-3 distances of 0.0001
4.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C5(H5), C8(H8), C11(H11), C12(H12), C13(H13),
 C14(H14), C15(H15), C16(H16), C18(H18), C19(H19), C20(H20), C21(H21), C22(H22)
;
_olex2_submission_special_instructions 'No special instructions were received'