Diastereoselective photodimerization reactions of chromone-2-carboxamides to construct a C2-chiral scaffold.
Yagishita, Fumitoshi; Baba, Nozomi; Ueda, Yuki; Katabira, Satoshi; Kasashima, Yoshio; Mino, Takashi; Sakamoto, Masami; Organic & biomolecular chemistry 12 (2014) 9644–9649; doi:10.1039/c4ob01827c

data_7154132
_publ_section_title
;
 Diastereoselective photodimerization reactions of chromone-2-carboxamides
 to construct a C2-chiral scaffold.
;
_journal_issue                   47
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              9644
_journal_page_last               9649
_journal_paper_doi               10.1039/c4ob01827c
_journal_volume                  12
_journal_year                    2014
_chemical_absolute_configuration rm
_chemical_formula_sum            'C39 H41 N3 O12'
_chemical_formula_weight         743.75
_chemical_melting_point          490.5(5)
_chemical_name_systematic
'Anti-HH photodimer of (S)-N-(1-methoxycarbonylethyl)-2-chromonecarboxamide'
_space_group_IT_number           170
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 65'
_symmetry_space_group_name_H-M   'P 65'
_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                120.00
_cell_formula_units_Z            6
_cell_length_a                   12.380(5)
_cell_length_b                   12.380(5)
_cell_length_c                   42.393(17)
_cell_measurement_reflns_used    3319
_cell_measurement_temperature    173
_cell_measurement_theta_max      19.29
_cell_measurement_theta_min      2.38
_cell_volume                     5627(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.1071
_diffrn_reflns_av_sigmaI/netI    0.1035
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       51
_diffrn_reflns_limit_l_min       -48
_diffrn_reflns_number            26515
_diffrn_reflns_theta_full        25.43
_diffrn_reflns_theta_max         25.43
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9854
_exptl_absorpt_correction_T_min  0.9524
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS Sheldrick 1996'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.317
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             2352
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: acetone/hexane'
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.387
_refine_diff_density_min         -0.444
_refine_diff_density_rms         0.083
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(11)
_refine_ls_extinction_coef       0.0151(10)
_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   0.952
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     495
_refine_ls_number_reflns         6805
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.951
_refine_ls_R_factor_all          0.0865
_refine_ls_R_factor_gt           0.0631
_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^)+(0.0796P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1416
_refine_ls_wR_factor_ref         0.1557
_reflns_number_gt                5028
_reflns_number_total             6805
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ob01827c2.cif
_cod_data_source_block           saka451_p65_nontwin
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '490-491' was changed to '490.5(5)' -
the average value was taken and precision was
estimated.

'_symmetry_cell_setting' value 'Hexagonal' changed to
'hexagonal' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/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 2827 2014-09-09 07:05:25Z andrius 

 Adding full bibliography for 7154126--7154132.cif.
;
_cod_original_sg_symbol_H-M      P6(5)
_cod_database_code               7154132