Reductive Cyclization of o-Nitroarylated-α,β-unsaturated Aldehydes and Ketones with TiCl<sub>3</sub>/HCl or Fe/HCl Leading to 1,2,3,9-Tetrahydro-4 H-carbazol-4-ones and Related Heterocycles.
Qiu, Yun; Dlugosch, Michael; Liu, Xin; Khan, Faiyaz; Ward, Jas S.; Lan, Ping; Banwell, Martin G.; The Journal of organic chemistry 83 (2018) 12023–12033; doi:10.1021/acs.joc.8b01940

data_4035263
_publ_section_title
;
 Reductive Cyclization of o-Nitroarylated-\a,\b-unsaturated Aldehydes and
 Ketones with TiCl<sub>3</sub>/HCl or Fe/HCl Leading to
 1,2,3,9-Tetrahydro-4 H-carbazol-4-ones and Related Heterocycles.
;
_journal_issue                   19
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              12023
_journal_page_last               12033
_journal_paper_doi               10.1021/acs.joc.8b01940
_journal_volume                  83
_journal_year                    2018
_chemical_formula_moiety         'C20 H16 N2'
_chemical_formula_sum            'C20 H16 N2'
_chemical_formula_weight         284.35
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2018-06-02
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.18 svn.r3508 for OlexSys, GUI svn.r5497)
;
_cell_angle_alpha                93.572(6)
_cell_angle_beta                 105.062(6)
_cell_angle_gamma                99.112(6)
_cell_formula_units_Z            4
_cell_length_a                   10.2371(7)
_cell_length_b                   12.0551(8)
_cell_length_c                   12.5051(9)
_cell_measurement_reflns_used    3158
_cell_measurement_temperature    150.00(10)
_cell_measurement_theta_max      29.5310
_cell_measurement_theta_min      3.8310
_cell_volume                     1462.73(18)
_computing_cell_refinement       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.00(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 10.3744
_diffrn_detector_type            Atlas
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
--------------------------------------------------------------------------
  1  \w    -38.00  57.00   1.00   20.00    --  -11.22  57.00 -90.00   95
  2  \w    -74.00  13.00   1.00   20.00    --  -11.22 -77.00   0.00   87
  3  \w    -83.00  13.00   1.00   20.00    --  -11.22 -57.00 120.00   96
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'New Xcalibur, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0109329000
_diffrn_orient_matrix_UB_12      0.0436276000
_diffrn_orient_matrix_UB_13      0.0438307000
_diffrn_orient_matrix_UB_21      -0.0511711000
_diffrn_orient_matrix_UB_22      0.0257115000
_diffrn_orient_matrix_UB_23      -0.0339687000
_diffrn_orient_matrix_UB_31      -0.0508431000
_diffrn_orient_matrix_UB_32      -0.0320756000
_diffrn_orient_matrix_UB_33      0.0204046000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0229
_diffrn_reflns_av_unetI/netI     0.0447
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            10737
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.372
_diffrn_reflns_theta_min         3.394
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.89711
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.46 (Rigaku Oxford Diffraction, 2018)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.291
_exptl_crystal_description       block
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.634
_exptl_crystal_size_mid          0.214
_exptl_crystal_size_min          0.139
_refine_diff_density_max         0.235
_refine_diff_density_min         -0.232
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     403
_refine_ls_number_reflns         5940
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0681
_refine_ls_R_factor_gt           0.0459
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0522P)^2^+0.2080P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1040
_refine_ls_wR_factor_ref         0.1202
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4420
_reflns_number_total             5940
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b01940_si_005.cif
_cod_data_source_block           MED-1161_scale
_cod_database_code               4035263
_shelxl_version_number           2014/6
_reflns_odcompleteness_completeness 99.21
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
2.a Secondary CH2 refined with riding coordinates:
 C10(H10A,H10B), C110(H11A,H11B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C12(H12), C13(H13), C14(H14), C15(H15), C16(H16),
 C18(H18), C19(H19), C20(H20), C21(H21), C22(H22), C102(H102), C103(H103),
 C104(H104), C112(H112), C113(H113), C114(H114), C115(H115), C116(H116),
 C118(H118), C119(H119), C120(H120), C121(H121), C122(H122)
;
_shelx_res_checksum              52732
_shelx_hkl_checksum              20837
_ins_header
;
TITL MED-1161_scale in P-1 
REM P-1 (#2 in standard setting)
CELL 0.71073  10.237075  12.055103  12.505138  93.5724 105.0623  99.1119
ZERR    4.00   0.000708   0.000842   0.000910   0.0058   0.0062   0.0058
LATT  1
SFAC C H N
UNIT 80.00 64.00 8.00
TREF
HKLF 4
END
;
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.134
_oxdiff_exptl_absorpt_empirical_full_min 0.907