Facile Synthesis of Azaspirocycles via Iron Trichloride-Promoted Cyclization/Chlorination of Cyclic 8-Aryl-5-aza-5-tosyl-2-en-7-yn-1-ols.
Yeh, Ming-Chang P; Fang, Cheng-Wei; Lin, Hsin-Hui; Organic letters 14 (2012) 1830–1833; doi:10.1021/ol300434m

data_1507580
_publ_section_title
;
 Facile Synthesis of Azaspirocycles via Iron Trichloride-Promoted
 Cyclization/Chlorination of Cyclic 8-Aryl-5-aza-5-tosyl-2-en-7-yn-1-ols.
;
_journal_issue                   7
_journal_name_full               'Organic letters'
_journal_page_first              1830
_journal_page_last               1833
_journal_paper_doi               10.1021/ol300434m
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C23 H23 Cl N2 O4 S'
_chemical_formula_sum            'C23 H23 Cl N2 O4 S'
_chemical_formula_weight         458.94
_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                79.770(2)
_cell_angle_beta                 82.637(3)
_cell_angle_gamma                69.060(2)
_cell_formula_units_Z            2
_cell_length_a                   8.4272(5)
_cell_length_b                   8.9805(4)
_cell_length_c                   15.5272(9)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     1077.37(10)
_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 0.982
_diffrn_measured_fraction_theta_max 0.982
_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  0.0183
_diffrn_reflns_av_sigmaI/netI    0.0276
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            8053
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         2.45
_exptl_absorpt_coefficient_mu    0.308
_exptl_absorpt_correction_T_max  0.9553
_exptl_absorpt_correction_T_min  0.8868
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.415
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.295
_refine_diff_density_min         -0.293
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         3738
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0416
_refine_ls_R_factor_gt           0.0337
_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^)+(0.0400P)^2^+0.5027P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0832
_refine_ls_wR_factor_ref         0.0884
_reflns_number_gt                3187
_reflns_number_total             3738
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol300434m_si_003.cif
_cod_data_source_block           a13356
_cod_database_code               1507580