Indole diterpenoid synthetic studies. Construction of the heptacyclic core of (-)-nodulisporic acid D.
Smith, 3rd, Amos B; Davulcu, Akin H.; Kürti, Laszló; Organic letters 8 (2006) 1669–1672; doi:10.1021/ol0602912

data_1505915
_publ_section_title
;
 Indole diterpenoid synthetic studies. Construction of the heptacyclic
 core of (-)-nodulisporic acid D.
;
_journal_issue                   8
_journal_name_full               'Organic letters'
_journal_page_first              1669
_journal_page_last               1672
_journal_paper_doi               10.1021/ol0602912
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C40 H53 N O4'
_chemical_formula_weight         611.83
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 99.003(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.9905(11)
_cell_length_b                   10.8313(12)
_cell_length_c                   16.1426(19)
_cell_measurement_temperature    143(1)
_cell_volume                     1725.3(3)
_computing_data_collection       'CrystalClear (Rigaku, 1999)'
_computing_data_reduction        'CrystalClear (Rigaku, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare, 1999)'
_diffrn_ambient_temperature      143(1)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'CCD Area Detector'
_diffrn_measurement_device_type  'Rigaku Mercury'
_diffrn_measurement_method       'phi and omega rotations'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0444
_diffrn_reflns_av_sigmaI/netI    0.1164
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9462
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.55
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.5689
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_density_diffrn    1.178
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.200
_refine_diff_density_min         -0.204
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.7(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.811
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     416
_refine_ls_number_reflns         5281
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.811
_refine_ls_R_factor_all          0.0683
_refine_ls_R_factor_gt           0.0409
_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^)+(0.0305P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0845
_refine_ls_wR_factor_ref         0.0950
_reflns_number_gt                3097
_reflns_number_total             5281
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0602912si20060202_050627.cif
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      'P 21     '
_cod_database_code               1505915