Studies towards the synthesis of bielschowskysin. Construction of the highly functionalized bicyclo[3.2.0]heptane segment.
Jana, Anupam; Mondal, Sujit; Ghosh, Subrata; Organic & biomolecular chemistry 13 (2015) 1846–1859; doi:10.1039/c4ob02182g

data_7154237
_publ_section_title
;
 Studies towards the synthesis of bielschowskysin. Construction of the
 highly functionalized bicyclo[3.2.0]heptane segment.
;
_journal_issue                   6
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              1846
_journal_page_last               1859
_journal_paper_doi               10.1039/c4ob02182g
_journal_volume                  13
_journal_year                    2015
_chemical_formula_sum            'C18 H16 N2 O8'
_chemical_formula_weight         388.33
_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_block_doi                 10.5517/ccz8nnj
_audit_creation_method           SHELXL-97
_audit_update_record
;
2012-09-19 deposited with the CCDC.
2014-12-02 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.830(3)
_cell_length_b                   9.556(4)
_cell_length_c                   31.119(14)
_cell_measurement_reflns_used    771
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      22.42
_cell_measurement_theta_min      2.90
_cell_volume                     1733.7(14)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'MERCURY 2.3'
_computing_publication_material  'ORTEP 3V.2'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.958
_diffrn_measured_fraction_theta_max 0.958
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0468
_diffrn_reflns_av_sigmaI/netI    0.1081
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            4171
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         1.31
_exptl_absorpt_coefficient_mu    0.119
_exptl_absorpt_correction_T_max  0.9929
_exptl_absorpt_correction_T_min  0.9882
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            COLORLESS
_exptl_crystal_density_diffrn    1.488
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       NEEDLE
_exptl_crystal_F_000             808
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.429
_refine_diff_density_min         -0.434
_refine_diff_density_rms         0.144
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.999
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         2858
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.999
_refine_ls_R_factor_all          0.1106
_refine_ls_R_factor_gt           0.0596
_refine_ls_shift/su_max          0.012
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.1428P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1321
_refine_ls_wR_factor_ref         0.1866
_reflns_number_gt                1945
_reflns_number_total             2858
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ob02182g2.cif
_cod_data_source_block           111
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN'
changed to 'multi-scan' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2935 2014-11-11 08:27:57Z andrius 

 Adding full bibliography for 7154237.cif.
;
_cod_original_cell_volume        1733.6(13)
_cod_original_sg_symbol_H-M      'P2(1)2(1)2(1) '
_cod_database_code               7154237