Synthesis of the Oxepinochromone Natural Products Ptaeroxylin (Desoxykarenin), Ptaeroxylinol, and Eranthin
Marjorie Bruder; Paul L. Haseler; Marina Muscarella; William Lewis; Christopher J. Moody; Journal of Organic Chemistry 75 (2010) 353–358; doi:10.1021/jo902117e

data_4025160
_publ_section_title
;
 Synthesis of the Oxepinochromone Natural Products Ptaeroxylin
 (Desoxykarenin), Ptaeroxylinol, and Eranthin
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              353
_journal_page_last               358
_journal_paper_doi               10.1021/jo902117e
_journal_volume                  75
_journal_year                    2010
_chemical_formula_sum            'C15 H14 O5'
_chemical_formula_weight         274.26
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                83.172(2)
_cell_angle_beta                 85.081(2)
_cell_angle_gamma                86.689(2)
_cell_formula_units_Z            4
_cell_length_a                   4.3828(6)
_cell_length_b                   16.726(2)
_cell_length_c                   17.199(2)
_cell_measurement_reflns_used    3375
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.421
_cell_measurement_theta_min      2.393
_cell_volume                     1245.8(3)
_computing_cell_refinement       'Bruker SAINT version 6.36A (Bruker, 2002)'
_computing_data_collection       'Bruker SMART version 5.625 (Bruker, 2001)'
_computing_data_reduction        'Bruker SAINT; SHELXTL (Sheldrick, 2008)'
_computing_molecular_graphics    ' ?'
_computing_publication_material
'enCIFer(Allen et al.,2004);PLATON(Spek,2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area detector'
_diffrn_measurement_method       \w
_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  0.0317
_diffrn_reflns_av_sigmaI/netI    0.0505
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            9194
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         2.39
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_T_max  0.996
_exptl_absorpt_correction_T_min  0.835
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2'
_exptl_crystal_colour            COLOURLESS
_exptl_crystal_density_diffrn    1.462
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       NEEDLE
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.68
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.324
_refine_diff_density_min         -0.262
_refine_diff_density_rms         0.065
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.249
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     368
_refine_ls_number_reflns         4372
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.249
_refine_ls_R_factor_all          0.0975
_refine_ls_R_factor_gt           0.0850
_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^)+(0.0367P)^2^+2.4010P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1600
_refine_ls_wR_factor_ref         0.1650
_reflns_number_gt                3765
_reflns_number_total             4372
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            jo902117e_si_001.cif
_cod_data_source_block           hepcyc
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN'
changed to 'multi-scan' according to the built-in table from CIF Core
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_database_code               4025160