Synthesis of Fluorenes via Tandem Copper-Catalyzed [3 + 2] Cycloaddition and Rhodium-Catalyzed Denitrogenative Cyclization in a 5-Exo Mode from 2-Ethynylbiaryls and N-Sulfonyl Azides in One Pot.
Seo, Boram; Jeon, Woo Hyung; Kim, Jaeeun; Kim, Sunghwa; Lee, Phil Ho; The Journal of organic chemistry 80 (2014) 722–; doi:10.1021/jo5027113

data_4030549
_publ_section_title
;
 Synthesis of Fluorenes via Tandem Copper-Catalyzed [3 + 2] Cycloaddition
 and Rhodium-Catalyzed Denitrogenative Cyclization in a 5-Exo Mode from
 2-Ethynylbiaryls and N-Sulfonyl Azides in One Pot.
;
_journal_issue                   2
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              722
_journal_paper_doi               10.1021/jo5027113
_journal_volume                  80
_journal_year                    2014
_chemical_formula_sum            'C21 H16 N O2 S'
_chemical_formula_weight         346.41
_chemical_name_common            SBR1332
_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
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.4181(4)
_cell_length_b                   10.6238(5)
_cell_length_c                   19.2166(9)
_cell_measurement_reflns_used    3837
_cell_measurement_temperature    296.(2)
_cell_measurement_theta_max      22.1169
_cell_measurement_theta_min      2.1905
_cell_volume                     1718.58(14)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker Instrument Service v2013.12.0.0'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_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 1.000
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0962
_diffrn_reflns_av_unetI/netI     0.0581
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            41065
_diffrn_reflns_theta_full        28.34
_diffrn_reflns_theta_max         28.34
_diffrn_reflns_theta_min         2.12
_exptl_absorpt_coefficient_mu    0.202
_exptl_absorpt_correction_T_max  0.960
_exptl_absorpt_correction_T_min  0.960
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2012/1 (Bruker AXS Inc.)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.339
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             724
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.240
_refine_diff_density_min         -0.455
_refine_ls_abs_structure_details
;
Flack x determined using 1305 quotients [(I+)-(I-)]/[(I+)+(I-)]
(Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.02(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         4277
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0645
_refine_ls_R_factor_gt           0.0451
_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^)+(0.0372P)^2^+0.5351P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0902
_refine_ls_wR_factor_ref         0.0998
_reflns_number_gt                3487
_reflns_number_total             4277
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo5027113_si_002.cif
_cod_data_source_block           I
_cod_database_code               4030549