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_1556232
_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 H8 O4'
_chemical_formula_sum            'C8 H8 O4'
_chemical_formula_weight         168.14
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                   21.3553(8)
_cell_length_b                   6.0840(2)
_cell_length_c                   6.1592(2)
_cell_measurement_reflns_used    5085
_cell_measurement_temperature    183(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      3.82
_cell_volume                     800.24(5)
_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      183(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.0300
_diffrn_reflns_av_sigmaI/netI    0.0236
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            5085
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.82
_exptl_absorpt_coefficient_mu    0.113
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.396
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.06
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.270
_refine_diff_density_min         -0.193
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.070
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     93
_refine_ls_number_reflns         986
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.070
_refine_ls_R_factor_all          0.0442
_refine_ls_R_factor_gt           0.0341
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0524P)^2^+0.1433P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0882
_refine_ls_wR_factor_ref         0.0948
_reflns_number_gt                817
_reflns_number_total             986
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol402221b_si_001.cif
_cod_data_source_block           FO3508
_cod_original_sg_symbol_Hall     '-P 2ac 2n '
_cod_original_sg_symbol_H-M      ' P n m a '
_cod_database_code               1556232