Novel synthesis of a 1,3,5-trioxazatriquinane skeleton using a nitrogen clamp.
Nagase, Hiroshi; Watanabe, Akio; Harada, Masaya; Nakajima, Mayumi; Hasebe, Ko; Mochizuki, Hidenori; Yoza, Kenji; Fujii, Hideaki; Organic letters 11 (2009) 539–542; doi:10.1021/ol8024988

data_1503741
_publ_section_title
;
 Novel synthesis of a 1,3,5-trioxazatriquinane skeleton using a nitrogen
 clamp.
;
_journal_issue                   3
_journal_name_full               'Organic letters'
_journal_page_first              539
_journal_page_last               542
_journal_paper_doi               10.1021/ol8024988
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration syn
_chemical_formula_sum            'C66 H80 N4 O12'
_chemical_formula_weight         1121.34
_chemical_name_systematic
; 
 ? 
;
_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                   11.3462(10)
_cell_length_b                   20.7132(17)
_cell_length_c                   24.828(2)
_cell_measurement_reflns_used    5840
_cell_measurement_temperature    90
_cell_measurement_theta_max      24.38
_cell_measurement_theta_min      2.21
_cell_volume                     5835.0(8)
_computing_cell_refinement       'Bruker APEX2'
_computing_data_collection       'Bruker APEX2'
_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      90
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'multilayer confocal mirror'
_diffrn_radiation_source         'fine-focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0549
_diffrn_reflns_av_sigmaI/netI    0.0830
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            34227
_diffrn_reflns_theta_full        27.87
_diffrn_reflns_theta_max         27.87
_diffrn_reflns_theta_min         1.64
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.9991
_exptl_absorpt_correction_T_min  0.9913
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
SADABS Sheldrick 1996
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.276
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'thin plate'
_exptl_crystal_F_000             2400
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.304
_refine_diff_density_min         -0.426
_refine_diff_density_rms         0.058
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.1(7)
_refine_ls_extinction_coef       0.00082(16)
_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   1.013
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     746
_refine_ls_number_reflns         13769
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0903
_refine_ls_R_factor_gt           0.0512
_refine_ls_shift/su_max          0.012
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0539P)^2^+0.1591P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1011
_refine_ls_wR_factor_ref         0.1153
_reflns_number_gt                9714
_reflns_number_total             13769
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol8024988_si_002.cif
_cod_data_source_block           051220
_cod_depositor_comments
;
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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        5834.9(9)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1503741