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_4022165
_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         'C20 H17 Br2 N5 O2, H2 O'
_chemical_formula_sum            'C20 H19 Br2 N5 O3'
_chemical_formula_weight         537.205
_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_author_name               'Mayer, P.'
_audit_block_code                C20H17Br2N5O2_H2O_kn271_lindel
_audit_creation_date             21-Jun-06
_audit_creation_method           'form98_non/compatible with shelxl97-2'
_audit_update_record             06-Jul-06
_cell_angle_alpha                90.00
_cell_angle_beta                 108.2042(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.2930(2)
_cell_length_b                   13.8479(3)
_cell_length_c                   14.1887(3)
_cell_measurement_reflns_used    24753
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      3.134
_cell_volume                     2107.83(7)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV, 1997-2004)'
_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 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       phi/omega-scan
_diffrn_orient_matrix_type       'by Bruker AXS Collect from scalepack cell'
_diffrn_orient_matrix_UB_11      -0.0332637
_diffrn_orient_matrix_UB_12      0.0626600
_diffrn_orient_matrix_UB_13      -0.0326593
_diffrn_orient_matrix_UB_21      -0.0415964
_diffrn_orient_matrix_UB_22      -0.0349342
_diffrn_orient_matrix_UB_23      -0.0634055
_diffrn_orient_matrix_UB_31      -0.0765015
_diffrn_orient_matrix_UB_32      -0.0082503
_diffrn_orient_matrix_UB_33      0.0204344
_diffrn_radiation_collimation    0.25
_diffrn_radiation_monochromator  'Montel graded multilayer x-ray optics'
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0168
_diffrn_reflns_av_sigmaI/netI    0.0236
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9346
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.31
_diffrn_source_current           55.00
_diffrn_source_power             3.025
_diffrn_source_type              'FR 591 generator'
_diffrn_source_voltage           55.00
_exptl_absorpt_coefficient_mu    3.878
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   scalepack
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.69285(6)
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.664
_refine_diff_density_min         -0.997
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     347
_refine_ls_number_reflns         4821
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0402
_refine_ls_R_factor_gt           0.0304
_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^)+(0.0382P)^2^+1.3876P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0737
_refine_ls_wR_factor_ref         0.0785
_reflns_number_gt                4059
_reflns_number_total             4821
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo061813urom20060901_080224.cif
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4022165