Palladium(ii)-catalysed total synthesis of naturally occurring pyrano[3,2-a]carbazole and pyrano[2,3-b]carbazole alkaloids.
Hesse, Ronny; Jäger, Anne; Schmidt, Arndt W.; Knölker, Hans-Joachim; Organic & biomolecular chemistry 12 (2014) 3866–3876; doi:10.1039/c4ob00367e

data_7153895
_publ_section_title
;
 Palladium(ii)-catalysed total synthesis of naturally occurring
 pyrano[3,2-a]carbazole and pyrano[2,3-b]carbazole alkaloids.
;
_journal_issue                   23
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              3866
_journal_page_last               3876
_journal_paper_doi               10.1039/c4ob00367e
_journal_volume                  12
_journal_year                    2014
_chemical_compound_source        synthesis
_chemical_formula_moiety         'C19 H19 N O2'
_chemical_formula_sum            'C19 H19 N O2'
_chemical_formula_weight         293.35
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 99.33(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.508(1)
_cell_length_b                   25.907(3)
_cell_length_c                   9.1340(1)
_cell_measurement_reflns_used    379
_cell_measurement_temperature    198(2)
_cell_measurement_theta_max      18.317
_cell_measurement_theta_min      4.183
_cell_volume                     1519.6(3)
_computing_cell_refinement       'Dirax/lsq (Duisenberg, 1992)'
_computing_data_collection       'Collect (Nonius BV, 1999)'
_computing_data_reduction        'EvalCCD (Duisenberg et al., 2003)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material
'WinGX (Farrugia 1999), enCIFer (Allen et al. 2004)'
_computing_structure_refinement
'SHELXL-97 (Sheldrick, 1997), WinGX (Farrugia 1999), PLATON (Spek 2005)'
_computing_structure_solution    'SIR2004 (Burla et al., 2005)'
_diffrn_ambient_temperature      198(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       \f
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0353
_diffrn_reflns_av_sigmaI/netI    0.0540
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            17349
_diffrn_reflns_theta_full        25.40
_diffrn_reflns_theta_max         25.40
_diffrn_reflns_theta_min         3.15
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.9909
_exptl_absorpt_correction_T_min  0.9582
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS version 2.10 (Sheldrick,Bruker AXS Inc.,2002)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.282
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.161
_refine_diff_density_min         -0.175
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.9(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     413
_refine_ls_number_reflns         5336
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0771
_refine_ls_R_factor_gt           0.0428
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0410P)^2^+0.1807P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0783
_refine_ls_wR_factor_ref         0.0904
_reflns_number_gt                3958
_reflns_number_total             5336
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ob00367e2.cif
_cod_data_source_block           an225
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7153895