Rapid synthesis of the N-methylwelwitindolinone skeleton.
MacKay, James A.; Bishop, Raynauld L.; Rawal, Viresh H.; Organic letters 7 (2005) 3421–3424; doi:10.1021/ol051043t

data_1506615
_publ_section_title
;
 Rapid synthesis of the N-methylwelwitindolinone skeleton.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              3421
_journal_page_last               3424
_journal_paper_doi               10.1021/ol051043t
_journal_volume                  7
_journal_year                    2005
_chemical_formula_sum            'C20 H23 N O3'
_chemical_formula_weight         325.39
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 93.9540(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.3309(9)
_cell_length_b                   9.9971(9)
_cell_length_c                   16.1798(15)
_cell_measurement_reflns_used    348
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      14
_cell_measurement_theta_min      -14
_cell_volume                     1667.1(3)
_computing_cell_refinement       'SMART and SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      203(2)
_diffrn_detector_area_resol_mean 0
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Siemens SMART CCD  PLATFORM'
_diffrn_measurement_method       '\w 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  0.0338
_diffrn_reflns_av_sigmaI/netI    0.0266
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            11861
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.27
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.263200
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2000)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.296
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.271
_refine_diff_density_min         -0.258
_refine_diff_density_rms         0.050
_refine_ls_extinction_coef       0.0022(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.490
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     241
_refine_ls_number_reflns         2888
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.490
_refine_ls_R_factor_all          0.0929
_refine_ls_R_factor_gt           0.0914
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0142P)^2^+2.8585P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1678
_refine_ls_wR_factor_ref         0.1684
_reflns_number_gt                2858
_reflns_number_total             2888
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol051043tsi20050505_044751.cif
_cod_data_source_block           vr6
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1506615