Biomimetic Synthesis of Zeylanone and Zeylanone Epoxide by Dimerization of 2-Methyl-1,4-naphthoquinone
Maruo, Sayako; Nishio, Kazuyuki; Sasamori, Takahiro; Tokitoh, Norihiro; Kuramochi, Kouji; Tsubaki, Kazunori; Organic Letters 15 (2013) 1556–; doi:10.1021/ol400335s

data_1511886
_publ_section_title
;
 Biomimetic Synthesis of Zeylanone and Zeylanone Epoxide by Dimerization
 of 2-Methyl-1,4-naphthoquinone
;
_journal_issue                   7
_journal_name_full               'Organic Letters'
_journal_page_first              1556
_journal_paper_doi               10.1021/ol400335s
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C22 H14 O5'
_chemical_formula_sum            'C22 H14 O5'
_chemical_formula_weight         358.33
_chemical_melting_point          212.5(5)
_chemical_name_common
11a,12-Dihydro-5b-methyl-5a,12a-epoxy-11H-dibenzo[b,h]fluorene-5,6,11,13(5bH)-tetrone
_chemical_name_systematic
; 
11a,12-Dihydro-5b-methyl-5a,12a-epoxy-11H-dibenzo[b,h]fluorene-5,6,11,13(5bH)-tetrone  
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 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                 111.0936(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.1557(5)
_cell_length_b                   11.7061(3)
_cell_length_c                   12.5509(4)
_cell_measurement_temperature    103(2)
_cell_measurement_theta_max      25.5
_cell_measurement_theta_min      1.74
_cell_volume                     1666.27(10)
_computing_cell_refinement       HKL2000
_computing_data_collection       CrystalClear
_computing_data_reduction        HKL2000
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      103(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku Mercury'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0295
_diffrn_reflns_av_sigmaI/netI    0.0341
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            10663
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.9949
_exptl_absorpt_correction_T_min  0.9849
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.428
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.228
_refine_diff_density_min         -0.186
_refine_diff_density_rms         0.037
_refine_ls_extinction_coef       0.0065(12)
_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   1.054
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     301
_refine_ls_number_reflns         3100
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0458
_refine_ls_R_factor_gt           0.0320
_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^)+(0.0443P)^2^+0.1218P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0792
_refine_ls_wR_factor_ref         0.0842
_reflns_number_gt                2420
_reflns_number_total             3100
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol400335s_si_002.cif
_cod_data_source_block           nazo
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '212-213' was changed to '212.5(5)' -
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P21/a
_cod_database_code               1511886