Total Synthesis of the Cytostatic Marine Natural Product Dibromophakellstatin via Three-Component Imidazolidinone Anellation
Michael Zöllinger; Peter Mayer; Thomas Lindel; Journal of Organic Chemistry 71 (2006) 9431–9439; doi:10.1021/jo061813u

data_4022166
_publ_contact_author_address
;
Department of Chemistry and Biochemistry
Ludwig Maximilian University
Butenandtstrasse 5-13 (Haus F)
D-81377 Munich
Germany
;
_publ_contact_author_email       thomas.lindel@cup.uni-muenchen.de
_publ_contact_author_fax         '+49 089-2180-77734'
_publ_contact_author_name        'Thomas Lindel'
_publ_section_title
;
 Total Synthesis of the Cytostatic Marine Natural Product
 Dibromophakellstatin via Three-Component Imidazolidinone Anellation
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              9431
_journal_page_last               9439
_journal_paper_doi               10.1021/jo061813u
_journal_volume                  71
_journal_year                    2006
_chemical_formula_moiety         'C16 H18 Br2 N4 O5'
_chemical_formula_sum            'C16 H18 Br2 N4 O5'
_chemical_formula_weight         506.146
_space_group_IT_number           92
_symmetry_cell_setting           tetragonal
_symmetry_Int_Tables_number      92
_symmetry_space_group_name_Hall  'P 4abw 2nw'
_symmetry_space_group_name_H-M   'P 41 21 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_author_name               'Mayer, P.'
_audit_block_code                C16H18Br2N4O5_in472_lindel
_audit_creation_date             14-Oct-04
_audit_creation_method           'form98_non/compatible with shelxl97-2'
_audit_update_record             06-Jul-06
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.0512(5)
_cell_length_b                   12.0512(5)
_cell_length_c                   27.0746(11)
_cell_measurement_reflns_used    8922
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      21.967
_cell_measurement_theta_min      3.134
_cell_volume                     3932.1(3)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_structure_refinement
'SHELXL-97 (G. M. Sheldrick. University of G\"ottingen, 97-2 version)'
_computing_structure_solution
;
A. Altomare, M. C. Burla, M. Camalli, G. L. Cascarano, C. Giacovazzo, A.
Guagliardi, A. G. G. Moliterni, G. Polidori, R. Spagna: SIR97: a new tool for
crystal structure determination and refinement; J. Appl. Crystallogr. 1999,
32, 115-119.
;
_diffrn_ambient_temperature      200(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       omega-scan
_diffrn_orient_matrix_type       'by Nonius Collect from scalepack cell'
_diffrn_orient_matrix_UB_11      -0.0048919
_diffrn_orient_matrix_UB_12      0.0398685
_diffrn_orient_matrix_UB_13      -0.0323194
_diffrn_orient_matrix_UB_21      -0.0465320
_diffrn_orient_matrix_UB_22      -0.0614986
_diffrn_orient_matrix_UB_23      -0.0136347
_diffrn_orient_matrix_UB_31      -0.0685303
_diffrn_orient_matrix_UB_32      0.0389115
_diffrn_orient_matrix_UB_33      0.0115650
_diffrn_radiation_collimation    0.35
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0917
_diffrn_reflns_av_sigmaI/netI    0.0757
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            10222
_diffrn_reflns_theta_full        21.96
_diffrn_reflns_theta_max         21.96
_diffrn_reflns_theta_min         3.29
_diffrn_source_current           80.00
_diffrn_source_power             4.000
_diffrn_source_type              'FR 591 generator'
_diffrn_source_voltage           50.00
_exptl_absorpt_coefficient_mu    4.158
_exptl_absorpt_correction_T_max  0.8940
_exptl_absorpt_correction_T_min  0.7259
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
Crystal faces optimized with XShape, rev. 1.02, STOE (Darmstadt, Germany)
Absorption correction with XRed, rev 1.09, STOE (Darmstadt, Germany)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.71000(13)
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             2016
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.374
_refine_diff_density_min         -0.313
_refine_diff_density_rms         0.069
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.028(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         2396
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0589
_refine_ls_R_factor_gt           0.0399
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0254P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0724
_refine_ls_wR_factor_ref         0.0793
_reflns_number_gt                1941
_reflns_number_total             2396
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo061813urom20060901_080236.cif
_cod_database_code               4022166