Total synthesis of ellipticine quinones, olivacine, and calothrixin B.
Ramkumar, Nagarajan; Nagarajan, Rajagopal; The Journal of organic chemistry 79 (2014) 736–741; doi:10.1021/jo402593w

data_4028973
_publ_section_title
;
 Total synthesis of ellipticine quinones, olivacine, and calothrixin B.
;
_journal_issue                   2
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              736
_journal_page_last               741
_journal_paper_doi               10.1021/jo402593w
_journal_volume                  79
_journal_year                    2014
_chemical_formula_moiety         'C18 H16 N2 O4'
_chemical_formula_sum            'C18 H16 N2 O4'
_chemical_formula_weight         324.33
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 114.882(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.764(8)
_cell_length_b                   6.382(3)
_cell_length_c                   17.533(9)
_cell_measurement_reflns_used    4314
_cell_measurement_temperature    298
_cell_measurement_theta_max      25.06
_cell_measurement_theta_min      2.28
_cell_volume                     1600.2(14)
_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      298
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0360
_diffrn_reflns_av_sigmaI/netI    0.0278
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            14515
_diffrn_reflns_theta_full        25.08
_diffrn_reflns_theta_max         25.08
_diffrn_reflns_theta_min         1.46
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.9857
_exptl_absorpt_correction_T_min  0.9716
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            ORANGE
_exptl_crystal_density_diffrn    1.346
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       NEEDLE
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.286
_refine_diff_density_min         -0.270
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.363
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     223
_refine_ls_number_reflns         2844
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.363
_refine_ls_R_factor_all          0.1033
_refine_ls_R_factor_gt           0.0971
_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^)+(0.0400P)^2^+2.5014P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1914
_refine_ls_wR_factor_ref         0.1940
_reflns_number_gt                2625
_reflns_number_total             2844
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo402593w_si_003.cif
_cod_data_source_block           4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/current/ACS/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/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_refine_ls_hydrogen_treatment' value 'MIXED' changed to
'mixed' according to
/usr/data/users/saulius/automatic-downloads/current/ACS/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 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        1600.1(14)
_cod_original_sg_symbol_H-M      'P2(1)/n  '
_cod_database_code               4028973