Synthesis of Calothrixins and Its Analogs Using FeCl3-Mediated Domino Reaction Protocol
Ramalingam, Bose Muthu; Saravanan, Velu; Mohanakrishnan, Arasambattu K.; Organic Letters 15 (2013) 3726–; doi:10.1021/ol4015738

data_1512193
_publ_section_title
;
 Synthesis of Calothrixins and Its Analogs Using FeCl3-Mediated Domino
 Reaction Protocol
;
_journal_issue                   14
_journal_name_full               'Organic Letters'
_journal_page_first              3726
_journal_paper_doi               10.1021/ol4015738
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C25 H15 Cl N2 O6 S'
_chemical_formula_sum            'C25 H15 Cl N2 O6 S'
_chemical_formula_weight         506.91
_chemical_name_systematic
;
9-(benzenesulfonyl)-2-(4-chloro-2-nitrophenyl)-4-hydroxy-9H-carbazole-3-carbaldehyde
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 90.963(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.1947(15)
_cell_length_b                   14.384(3)
_cell_length_c                   18.795(3)
_cell_measurement_reflns_used    2809
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      1.78
_cell_volume                     2215.1(7)
_computing_cell_refinement       APEX2
_computing_data_collection       'APEX2 (Bruker, 2008)'
_computing_data_reduction        'SAINT (Bruker, 2008)'
_computing_molecular_graphics    'ORTEP3 (Farrugia, 1997)'
_computing_publication_material
'SHELXL-97 (Sheldrick, 2008) and  PLATON  (Spek, 2009)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Axs Smart APEXII CCD diffractometer'
_diffrn_measurement_method       '\w & \f scans'
_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  0.0555
_diffrn_reflns_av_sigmaI/netI    0.0475
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            16586
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.78
_exptl_absorpt_coefficient_mu    0.314
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.520
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.418
_refine_diff_density_min         -0.395
_refine_diff_density_rms         0.060
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         3893
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0786
_refine_ls_R_factor_gt           0.0534
_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^)+(0.0933P)^2^+0.9326P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1468
_refine_ls_wR_factor_ref         0.1721
_reflns_number_gt                2809
_reflns_number_total             3893
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol4015738_si_002.cif
_cod_data_source_block           k
_cod_original_cell_volume        2215.2(7)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1512193