Stereoselective synthesis of pyridinones: application to the synthesis of (-)-barrenazines.
Focken, Thilo; Charette, André B; Organic letters 8 (2006) 2985–2988; doi:10.1021/ol0609006

data_1506028
_publ_section_title
;
 Stereoselective synthesis of pyridinones: application to the synthesis of
 (-)-barrenazines.
;
_journal_issue                   14
_journal_name_full               'Organic letters'
_journal_page_first              2985
_journal_page_last               2988
_journal_paper_doi               10.1021/ol0609006
_journal_volume                  8
_journal_year                    2006
_chemical_absolute_configuration rmad
_chemical_compound_source        'Synthesized by the authors. See text'
_chemical_formula_moiety         'C26 H28 N2 O2'
_chemical_formula_sum            'C26 H28 N2 O2'
_chemical_formula_weight         400.50
_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                   9.9053(2)
_cell_length_b                   13.1534(3)
_cell_length_c                   17.1989(4)
_cell_measurement_reflns_used    6444
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      72.89
_cell_measurement_theta_min      3.36
_cell_volume                     2240.82(9)
_computing_cell_refinement       'SMART (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'SHELXTL (Bruker, 1997)'
_computing_publication_material  'UdMX (local program)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 5.5
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker AXS Smart 2K/Platform'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Sealed Tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.022
_diffrn_reflns_av_sigmaI/netI    0.0113
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            26983
_diffrn_reflns_theta_full        72.88
_diffrn_reflns_theta_max         72.88
_diffrn_reflns_theta_min         4.23
_diffrn_standards_decay_%        0.00
_diffrn_standards_number         215
_exptl_absorpt_coefficient_mu    0.591
_exptl_absorpt_correction_T_max  0.9000
_exptl_absorpt_correction_T_min  0.8500
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs (Sheldrick,1996)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.187
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.157
_refine_diff_density_min         -0.171
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), 1873 Friedel Pairs'
_refine_ls_abs_structure_Flack   0.04(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     274
_refine_ls_number_reflns         4421
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0284
_refine_ls_R_factor_gt           0.0280
_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^)+(0.0472P)^2^+0.3259P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0727
_refine_ls_wR_factor_ref         0.0730
_reflns_number_gt                4341
_reflns_number_total             4421
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ol0609006si20060523_050824.cif
_cod_data_source_block           cha117
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

'_geom_bond_publ_flag'
value 'Y' changed to 'y' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (32
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (42 times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               1506028