Formal synthesis of belactosin A and hormaomycin via a diastereoselective intramolecular cyclopropanation of an alpha-nitro diazoester.
Vanier, Sébastien F; Larouche, Guillaume; Wurz, Ryan P.; Charette, André B; Organic letters 12 (2010) 672–675; doi:10.1021/ol9026528

data_1503380
_publ_section_title
;
 Formal synthesis of belactosin A and hormaomycin via a diastereoselective
 intramolecular cyclopropanation of an alpha-nitro diazoester.
;
_journal_issue                   4
_journal_name_full               'Organic letters'
_journal_page_first              672
_journal_page_last               675
_journal_paper_doi               10.1021/ol9026528
_journal_volume                  12
_journal_year                    2010
_chemical_compound_source        'Synthesized by the authors. See text'
_chemical_formula_moiety         'C15 H12 N2 O6'
_chemical_formula_sum            'C15 H12 N2 O6'
_chemical_formula_weight         316.27
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                76.3780(10)
_cell_angle_beta                 78.0680(10)
_cell_angle_gamma                80.066(2)
_cell_formula_units_Z            2
_cell_length_a                   6.6993(2)
_cell_length_b                   8.1796(2)
_cell_length_c                   13.0249(4)
_cell_measurement_reflns_used    4955
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      55.21
_cell_measurement_theta_min      3.55
_cell_volume                     672.89(3)
_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 0.973
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device_type  'Bruker Smart 2000'
_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  0.033
_diffrn_reflns_av_sigmaI/netI    0.0573
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            8366
_diffrn_reflns_theta_full        55.20
_diffrn_reflns_theta_max         55.20
_diffrn_reflns_theta_min         3.55
_diffrn_standards_decay_%        0.00
_diffrn_standards_number         45
_exptl_absorpt_coefficient_mu    1.048
_exptl_absorpt_correction_T_max  0.9200
_exptl_absorpt_correction_T_min  0.8000
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs (Sheldrick,1996)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.561
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             328
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.207
_refine_diff_density_min         -0.243
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         1654
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0604
_refine_ls_R_factor_gt           0.0353
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0407P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0753
_refine_ls_wR_factor_ref         0.0815
_reflns_number_gt                1173
_reflns_number_total             1654
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ol9026528_si_001.cif
_cod_data_source_block           cha126
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_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 2.4.2 from 2011-04-26 (26
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 2.4.2 from 2011-04-26 (41 time).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1503380