Facile one-pot synthesis of 2,3-dihydro-1H-indolizinium derivatives by rhodium(iii)-catalyzed intramolecular oxidative annulation via C-H activation: application to ficuseptine synthesis.
Upadhyay, Nitinkumar Satyadev; Jayakumar, Jayachandran; Cheng, Chien-Hong; Chemical communications (Cambridge, England) 53 (2017) 2491–2494; doi:10.1039/c7cc00008a

data_7119542
_publ_section_title
;
 Facile one-pot synthesis of 2,3-dihydro-1H-indolizinium derivatives by
 rhodium(iii)-catalyzed intramolecular oxidative annulation via C-H
 activation: application to ficuseptine synthesis.
;
_journal_issue                   16
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              2491
_journal_page_last               2494
_journal_paper_doi               10.1039/c7cc00008a
_journal_volume                  53
_journal_year                    2017
_chemical_formula_sum            'C18 H16 B F4 N'
_chemical_formula_weight         333.13
_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
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2016-07-25 deposited with the CCDC.
2017-01-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   20.2206(11)
_cell_length_b                   9.2842(5)
_cell_length_c                   8.5994(5)
_cell_measurement_temperature    296(2)
_cell_volume                     1614.38(16)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'APEX2 (Bruker AXS, 2010)'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0317
_diffrn_reflns_av_unetI/netI     0.0285
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            12010
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.436
_diffrn_reflns_theta_min         2.014
_exptl_absorpt_coefficient_mu    0.111
_exptl_absorpt_correction_T_max  0.9485
_exptl_absorpt_correction_T_min  0.8438
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2012/1 (Bruker AXS Inc.)'
_exptl_crystal_colour            'Yellow Brown'
_exptl_crystal_density_diffrn    1.371
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lump
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.265
_refine_diff_density_min         -0.236
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.0(19)
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     264
_refine_ls_number_reflns         3276
_refine_ls_number_restraints     187
_refine_ls_restrained_S_all      1.176
_refine_ls_R_factor_all          0.0769
_refine_ls_R_factor_gt           0.0511
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0789P)^2^+0.3203P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1324
_refine_ls_wR_factor_ref         0.1486
_reflns_Friedel_coverage         0.870
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                2384
_reflns_number_total             3276
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7cc00008a2.cif
_cod_data_source_block           140501LT_a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 7119542.cif.
;
_cod_database_code               7119542
_shelxl_version_number           2013-4
_shelx_res_checksum              39380