Expedient synthesis of the tetracyclic core of ent-nakadomarin A.
Deng, Haibing; Yang, Xiaobao; Tong, Zhaolong; Li, Zhong; Zhai, Hongbin; Organic letters 10 (2008) 1791–1793; doi:10.1021/ol800579j

data_1504674
_publ_section_title
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 Expedient synthesis of the tetracyclic core of ent-nakadomarin A.
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_journal_issue                   9
_journal_name_full               'Organic letters'
_journal_page_first              1791
_journal_page_last               1793
_journal_paper_doi               10.1021/ol800579j
_journal_volume                  10
_journal_year                    2008
_chemical_absolute_configuration ad
_chemical_formula_sum            'C33 H35 N3 O11 S'
_chemical_formula_weight         681.70
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 98.485(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.5429(17)
_cell_length_b                   12.175(3)
_cell_length_c                   18.830(4)
_cell_measurement_reflns_used    2109
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20.83
_cell_measurement_theta_min      2.73
_cell_volume                     1710.3(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0252
_diffrn_reflns_av_sigmaI/netI    0.0531
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            8954
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.158
_exptl_absorpt_correction_T_max  0.9691
_exptl_absorpt_correction_T_min  0.9542
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.324
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             716
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.139
_refine_diff_density_min         -0.133
_refine_diff_density_rms         0.031
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.09(8)
_refine_ls_extinction_coef       0.0035(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     439
_refine_ls_number_reflns         5837
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0720
_refine_ls_R_factor_gt           0.0464
_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^)+(0.0353P)^2^+0.0795P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0853
_refine_ls_wR_factor_ref         0.0985
_reflns_number_gt                4177
_reflns_number_total             5837
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol800579j-file004.cif
_cod_data_source_block           070920c
_cod_depositor_comments
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The following automatic conversions were performed:

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

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
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_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1504674