Synthesis of new pentacyclic chromophores through a highly regio- and diastereoselective cascade process.
Chamas, Zein el abidine; Dietz, Olivier; Aubert, Emmanuel; Fort, Yves; Mamane, Victor; Organic & biomolecular chemistry 8 (2010) 4815–4818; doi:10.1039/c0ob00390e

data_7153493
_publ_section_title
;
 Synthesis of new pentacyclic chromophores through a highly regio- and
 diastereoselective cascade process.
;
_journal_issue                   21
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4815
_journal_page_last               4818
_journal_paper_doi               10.1039/c0ob00390e
_journal_volume                  8
_journal_year                    2010
_chemical_formula_moiety         '2(C21 H17 N O4), C2 H3 N'
_chemical_formula_sum            'C44 H37 N3 O8'
_chemical_formula_weight         735.77
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 93.1660(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.61290(10)
_cell_length_b                   19.2298(3)
_cell_length_c                   32.3685(5)
_cell_measurement_reflns_used    22423
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      77.2097
_cell_measurement_theta_min      3.5524
_cell_volume                     3488.36(10)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.31 (release 08-01-2009 CrysAlis171 .NET)
(compiled Jan 8 2009,16:24:04)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.31 (release 08-01-2009 CrysAlis171 .NET)
(compiled Jan 8 2009,16:24:04)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.31 (release 08-01-2009 CrysAlis171 .NET)
(compiled Jan 8 2009,16:24:04)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR_92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      110(2)
_diffrn_detector_area_resol_mean 10.4508
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
;
'SuperNova (Dual, Cu at zero, Cu active), detector: Atlas'
;
_diffrn_measurement_method       oscillation
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Nova (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0185
_diffrn_reflns_av_sigmaI/netI    0.0146
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -40
_diffrn_reflns_number            37426
_diffrn_reflns_theta_full        77.48
_diffrn_reflns_theta_max         77.48
_diffrn_reflns_theta_min         3.57
_exptl_absorpt_coefficient_mu    0.795
_exptl_absorpt_correction_T_max  0.929
_exptl_absorpt_correction_T_min  0.824
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.29 (release 10-06-2008 CrysAlis171 .NET)
(compiled Jun 10 2008,16:49:55)
Analytical numeric absorption correction using a multifaceted crystal
model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            orange-brown
_exptl_crystal_density_diffrn    1.401
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1544
_exptl_crystal_size_max          0.3628
_exptl_crystal_size_mid          0.1350
_exptl_crystal_size_min          0.1099
_refine_diff_density_max         0.473
_refine_diff_density_min         -0.373
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     503
_refine_ls_number_reflns         7394
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0485
_refine_ls_R_factor_gt           0.0456
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0559P)^2^+1.9507P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1151
_refine_ls_wR_factor_ref         0.1169
_reflns_number_gt                6875
_reflns_number_total             7394
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ob00390e.txt
_cod_data_source_block           VM629
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7153493