Total Synthesis and Structural Revision of Vannusals A and B: Synthesis of the Originally Assigned Structure of Vannusal B
K. C. Nicolaou; Adrian Ortiz; Hongjun Zhang; Philippe Dagneau; Andreas Lanver; Michael P. Jennings; Stellios Arseniyadis; Raffaella Faraoni; Dimitrios E. Lizos; Journal of the American Chemical Society 132 (2010) 7138–7152; doi:10.1021/ja100740t

data_4102415
_publ_section_title
;
 Total Synthesis and Structural Revision of Vannusals A and B: Synthesis
 of the Originally Assigned Structure of Vannusal B
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7138
_journal_page_last               7152
_journal_paper_doi               10.1021/ja100740t
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C20 H25 Br N O3'
_chemical_formula_weight         407.32
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.8795(14)
_cell_length_b                   14.854(3)
_cell_length_c                   19.609(4)
_cell_measurement_reflns_used    6472
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      23.86
_cell_measurement_theta_min      2.49
_cell_volume                     2003.8(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT+'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0292
_diffrn_reflns_av_sigmaI/netI    0.0496
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            18616
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         28.00
_diffrn_reflns_theta_min         1.72
_diffrn_standards_decay_%        1
_exptl_absorpt_coefficient_mu    2.069
_exptl_absorpt_correction_T_max  0.7466
_exptl_absorpt_correction_T_min  0.5853
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1999)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.350
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Parallelepiped
_exptl_crystal_F_000             844
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.642
_refine_diff_density_min         -0.298
_refine_diff_density_rms         0.057
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.004(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.015
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         4809
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.0889
_refine_ls_R_factor_gt           0.0529
_refine_ls_shift/su_max          0.150
_refine_ls_shift/su_mean         0.025
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0800P)^2^+0.3300P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1379
_refine_ls_wR_factor_ref         0.1576
_reflns_number_gt                3015
_reflns_number_total             4809
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja100740t_si_002.cif
_cod_data_source_block           hz1302
_cod_database_code               4102415