Total synthesis and detection of the bilirubin oxidation product (Z)-2-(3-ethenyl-4-methyl-5-oxo-1,5-dihydro-2H-pyrrol-2-ylidene)ethanamide (Z-BOX A).
Klopfleisch, Maurice; Seidel, Raphael A.; Görls, Helmar; Richter, Hannes; Beckert, Rainer; Imhof, Wolfgang; Reiher, Markus; Pohnert, Georg; Westerhausen, Matthias; Organic letters 15 (2013) 4608–4611; doi:10.1021/ol402221b

data_1556230
_publ_section_title
;
 Total synthesis and detection of the bilirubin oxidation product
 (Z)-2-(3-ethenyl-4-methyl-5-oxo-1,5-dihydro-2H-pyrrol-2-ylidene)ethanamide
 (Z-BOX A).
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              4608
_journal_page_last               4611
_journal_paper_doi               10.1021/ol402221b
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C8 H7 Br O4'
_chemical_formula_sum            'C8 H7 Br O4'
_chemical_formula_weight         247.05
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 100.989(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   3.9163(2)
_cell_length_b                   22.1922(9)
_cell_length_c                   10.2727(7)
_cell_measurement_reflns_used    6025
_cell_measurement_temperature    133(2)
_cell_measurement_theta_max      27.49
_cell_measurement_theta_min      2.22
_cell_volume                     876.44(8)
_computing_cell_refinement       DENZO
_computing_data_collection       COLLECT
_computing_data_reduction        DENZO
_computing_molecular_graphics    SHELXTL/PC
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      133(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'phi- + omega-scan'
_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  0.0801
_diffrn_reflns_av_sigmaI/netI    0.0857
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            6025
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.22
_exptl_absorpt_coefficient_mu    4.667
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.872
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.04
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.655
_refine_diff_density_min         -0.669
_refine_diff_density_rms         0.122
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.984
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     120
_refine_ls_number_reflns         1990
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.984
_refine_ls_R_factor_all          0.0878
_refine_ls_R_factor_gt           0.0418
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0440P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0831
_refine_ls_wR_factor_ref         0.0966
_reflns_number_gt                1332
_reflns_number_total             1990
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol402221b_si_001.cif
_cod_data_source_block           FO4025
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1556230