A chemo- and regiocontrolled approach to bipyrazoles and pyridones via the reaction of ethyl 5-acyl-4-pyrone-2-carboxylates with hydrazines.
Obydennov, D. L.; Khammatova, L. R.; Eltsov, O. S.; Sosnovskikh, V. Y.; Organic & biomolecular chemistry 16 (2018) 1692–1707; doi:10.1039/c7ob02725g

data_7156129
_publ_section_title
;
 A chemo- and regiocontrolled approach to bipyrazoles and pyridones via
 the reaction of ethyl 5-acyl-4-pyrone-2-carboxylates with hydrazines.
;
_journal_issue                   10
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              1692
_journal_page_last               1707
_journal_paper_doi               10.1039/c7ob02725g
_journal_volume                  16
_journal_year                    2018
_chemical_formula_sum            'C27 H22 N4 O2'
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_audit_update_record
;
2018-02-02 deposited with the CCDC.
2018-02-07 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
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_cell_angle_gamma                90.00
_cell_formula_units_Z            4
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_cell_length_b                   10.998(5)
_cell_length_c                   23.489(10)
_cell_measurement_reflns_used    8310
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      65.2072
_cell_measurement_theta_min      3.7538
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_computing_cell_refinement
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CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.9 (release 23-03-2006 CrysAlis171 .NET)
(compiled Mar 23 2006,23:39:28)
;
_computing_data_collection
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CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.29.9 (release 23-03-2006 CrysAlis171 .NET)
(compiled Mar 23 2006,23:39:28)
;
_computing_data_reduction
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CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.9 (release 23-03-2006 CrysAlis171 .NET)
(compiled Mar 23 2006,23:39:28)
;
_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      293(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Xcalibur 3'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0425
_diffrn_reflns_av_sigmaI/netI    0.0294
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
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_diffrn_reflns_limit_l_max       27
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_diffrn_reflns_theta_full        66.59
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_exptl_absorpt_coefficient_mu    0.681
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_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
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CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.9 (release 23-03-2006 CrysAlis171 .NET)
(compiled Mar 23 2006,23:39:28)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
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_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.313
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             912
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.222
_refine_diff_density_min         -0.178
_refine_diff_density_rms         0.044
_refine_ls_extinction_coef       0.0037(4)
_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   1.006
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     614
_refine_ls_number_reflns         3813
_refine_ls_number_restraints     26
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.0563
_refine_ls_R_factor_gt           0.0450
_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^)+(0.0985P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1162
_refine_ls_wR_factor_ref         0.1250
_reflns_number_gt                2943
_reflns_number_total             3813
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ob02725g2.cif
_cod_data_source_block           dc
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/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 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7156128--7156130.cif.
;
_cod_original_cell_volume        2197.8(19)
_cod_original_sg_symbol_H-M      Pc
_cod_database_code               7156129