1,1'-Carbonyldiimidazole-mediated transformation of allomaltol containing hydrazides into substituted 3-acetyltetronic acids.
Komogortsev, Andrey N.; Lichitskii, Boris V.; Melekhina, Valeriya G.; Organic & biomolecular chemistry 21 (2023) 7224–7230; doi:10.1039/d3ob01136d

data_7159543
_publ_section_title
;
 1,1'-Carbonyldiimidazole-mediated transformation of allomaltol containing
 hydrazides into substituted 3-acetyltetronic acids.
;
_journal_issue                   35
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              7224
_journal_page_last               7230
_journal_paper_doi               10.1039/d3ob01136d
_journal_volume                  21
_journal_year                    2023
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C20 H24 N2 O4'
_chemical_formula_sum            'C20 H24 N2 O4'
_chemical_formula_weight         356.41
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2023-06-15 deposited with the CCDC.	2023-08-22 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.1768(3)
_cell_length_b                   9.4700(3)
_cell_length_c                   21.5491(8)
_cell_measurement_reflns_used    9812
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      33.74
_cell_measurement_theta_min      2.35
_cell_volume                     1872.71(11)
_computing_cell_refinement       'SAINT (Bruker, 2019)'
_computing_data_collection       '<i>APEX3</i> (Bruker, 2019)'
_computing_data_reduction        'SAINT (Bruker, 2019)'
_computing_molecular_graphics
'SHELXTL (Sheldrick, Acta Cryst., 2008, A64, 112-122)'
_computing_publication_material
'SHELXTL (Sheldrick, Acta Cryst., 2008, A64, 112-122)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker AXS D8 QUEST, Photon III detector'
_diffrn_measurement_method       '\f and \w shutterless scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0316
_diffrn_reflns_av_unetI/netI     0.0209
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            54599
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         33.738
_diffrn_reflns_theta_min         2.349
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           30
_diffrn_source_power             1.5
_diffrn_source_size              '0.6 mm, fine-focus'
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.7467
_exptl_absorpt_correction_T_min  0.6797
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS 2016/2 (Krause et al., J. Appl. Cryst. 2015, 48, 3-10)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.264
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.867
_exptl_crystal_size_mid          0.80
_exptl_crystal_size_min          0.302
_refine_diff_density_max         0.327
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details
;
 Flack x determined using 2990 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.11(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         7492
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0367
_refine_ls_R_factor_gt           0.0332
_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^)+(0.0516P)^2^+0.2009P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0860
_refine_ls_wR_factor_ref         0.0889
_reflns_Friedel_coverage         0.784
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                7058
_reflns_number_total             7492
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3ob01136d2.cif
_cod_data_source_block           KJC6PHYP
_cod_depositor_comments
'Adding full bibliography for 7159539--7159545.cif.'
_cod_database_code               7159543
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.927
_shelx_estimated_absorpt_t_max   0.974
_shelx_res_checksum              92074