Comment on "An unexpected formation of the novel 7-oxa-2azabicyclo[2.2.1]hept-5-ene skeleton during the reaction of furfurylamine with maleimides and their bioprospection using a zebrafish embryo model" by C. E. Puerto Galvis and V. V. Kouznetsov, Org. Biomol. Chem., 2013, 11, 407
Zubkov, Fedor Ivanovich; Kvyatkovskaya, Elizaveta Alexandrovna; Nikitina, Eugeniya V.; Amoyaw, Prince; Kouznetsov, Vladimir; Lazarenko , Vladimir; Khrustalev, Victor N.; Org. Biomol. Chem.  (2017) –; doi:10.1039/C7OB01207A

data_7155759
_publ_section_title
;
 Comment on "An unexpected formation of the novel
 7-oxa-2azabicyclo[2.2.1]hept-5-ene skeleton during the reaction of
 furfurylamine with maleimides and their bioprospection using a zebrafish
 embryo model" by C. E. Puerto Galvis and V. V. Kouznetsov, Org. Biomol.
 Chem., 2013, 11, 407
;
_journal_name_full               'Org. Biomol. Chem.'
_journal_paper_doi               10.1039/C7OB01207A
_journal_year                    2017
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C16 H16 N2 O3'
_chemical_formula_sum            'C16 H16 N2 O3'
_chemical_formula_weight         284.31
_space_group_crystal_system      orthorhombic
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     difmap
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/6
_audit_update_record
;
2017-04-29 deposited with the CCDC.
2017-07-07 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.231(3)
_cell_length_b                   14.729(3)
_cell_length_c                   5.6114(11)
_cell_measurement_reflns_used    500
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      33.0
_cell_measurement_theta_min      2.5
_cell_volume                     1424.1(5)
_computing_cell_refinement       'iMosflm (Battye et al., 2011)'
_computing_data_collection       'Marccd (Doyle, 2011)'
_computing_data_reduction        iMosflm
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2015)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.977
_diffrn_measured_fraction_theta_max 0.957
_diffrn_measurement_device_type  'Rayonix SX165 CCD'
_diffrn_measurement_method       '/f scan'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.96990
_diffrn_reflns_av_R_equivalents  0.0717
_diffrn_reflns_av_unetI/netI     0.1403
_diffrn_reflns_Laue_measured_fraction_full 0.977
_diffrn_reflns_Laue_measured_fraction_max 0.957
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            20771
_diffrn_reflns_point_group_measured_fraction_full 0.979
_diffrn_reflns_point_group_measured_fraction_max 0.956
_diffrn_reflns_theta_full        35.587
_diffrn_reflns_theta_max         38.445
_diffrn_reflns_theta_min         2.483
_exptl_absorpt_coefficient_mu    0.195
_exptl_absorpt_correction_T_max  0.987
_exptl_absorpt_correction_T_min  0.987
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Scala (Evans, 2006)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.326
_exptl_crystal_description       prism
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.03
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.525
_refine_diff_density_min         -0.302
_refine_diff_density_rms         0.062
_refine_ls_abs_structure_details
;
 Flack x determined using 598 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.2(8)
_refine_ls_extinction_coef       0.008(1)
_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   1.008
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         3004
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.1411
_refine_ls_R_factor_gt           0.0792
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.01P)^2^+1.2P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1694
_refine_ls_wR_factor_ref         0.1934
_reflns_Friedel_coverage         0.804
_reflns_Friedel_fraction_full    0.982
_reflns_Friedel_fraction_max     0.954
_reflns_number_gt                1676
_reflns_number_total             3004
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ob01207a2.cif
_cod_data_source_block           7h
_cod_database_code               7155759
_shelx_estimated_absorpt_t_min   0.994
_shelx_estimated_absorpt_t_max   0.994
_shelxl_version_number           2014/6
_shelx_res_checksum              16358