Total Synthesis of (-)-5,6-Dihydrocineromycin B
Guozhi Li; Xiaoxia Yang; Hongbin Zhai; Journal of Organic Chemistry 74 (2009) 1356–1359; doi:10.1021/jo802503x

data_4024315
_publ_section_title
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Total Synthesis of (-)-5,6-Dihydrocineromycin B
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1356
_journal_page_last               1359
_journal_paper_doi               10.1021/jo802503x
_journal_volume                  74
_journal_year                    2009
_chemical_absolute_configuration ad
_chemical_formula_sum            'C17 H28 O4'
_chemical_formula_weight         296.39
_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                   7.9368(9)
_cell_length_b                   14.6814(18)
_cell_length_c                   14.9334(17)
_cell_measurement_reflns_used    1126
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      38.921
_cell_measurement_theta_min      5.456
_cell_volume                     1740.1(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      293(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  0.0574
_diffrn_reflns_av_sigmaI/netI    0.0655
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            10328
_diffrn_reflns_theta_full        26.99
_diffrn_reflns_theta_max         26.99
_diffrn_reflns_theta_min         1.95
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7370
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.131
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.450
_exptl_crystal_size_mid          0.185
_exptl_crystal_size_min          0.179
_refine_diff_density_max         0.247
_refine_diff_density_min         -0.129
_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   -10(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.978
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         2174
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.977
_refine_ls_R_factor_all          0.0843
_refine_ls_R_factor_gt           0.0408
_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 
 [0.00000+1.00000exp(2.00(sin\q/\l)^2^)]/ 
   [\s^2^(Fo^2^)+0.0000+0.0000*P+(0.0359P)^2^+0.0000sin\q/\l] 
 where P = 0.33333Fo^2^ + 0.66667Fc^2^ 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0822
_refine_ls_wR_factor_ref         0.0960
_reflns_number_gt                1183
_reflns_number_total             2174
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo802503x_si_003.cif
_cod_data_source_block           cd28298
_cod_depositor_comments
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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.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
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_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4024315