Regioselective and guided C-h activation of 4-nitropyrazoles.
Iaroshenko, Viktor O; Gevorgyan, Ashot; Davydova, Olena; Villinger, Alexander; Langer, Peter; The Journal of organic chemistry 79 (2014) 2906–2915; doi:10.1021/jo4025418

data_4029236
_publ_section_title
;
 Regioselective and guided C-h activation of 4-nitropyrazoles.
;
_journal_issue                   7
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              2906
_journal_page_last               2915
_journal_paper_doi               10.1021/jo4025418
_journal_volume                  79
_journal_year                    2014
_chemical_formula_moiety         'C20 H19 N3 O2'
_chemical_formula_sum            'C20 H19 N3 O2'
_chemical_formula_weight         333.38
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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                 105.4850(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.6100(3)
_cell_length_b                   26.7655(8)
_cell_length_c                   6.8056(2)
_cell_measurement_reflns_used    9930
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      65.170
_cell_measurement_theta_min      5.349
_cell_volume                     1686.97(9)
_computing_cell_refinement       'Bruker Apex V7.51A'
_computing_data_collection       'Bruker Apex V7.51A'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'ORTEP-3v2.01 (Farrugia, 1997)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker-Nonius Apex X8-CCD-diffractometer'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0244
_diffrn_reflns_av_sigmaI/netI    0.0205
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -40
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            30515
_diffrn_reflns_theta_full        32.50
_diffrn_reflns_theta_max         32.50
_diffrn_reflns_theta_min         2.67
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9820
_exptl_absorpt_correction_T_min  0.9539
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2004)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.313
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.44
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.406
_refine_diff_density_min         -0.291
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         6109
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0591
_refine_ls_R_factor_gt           0.0498
_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^)+(0.0701P)^2^+0.4722P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1314
_refine_ls_wR_factor_ref         0.1390
_reflns_number_gt                5188
_reflns_number_total             6109
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            jo4025418_si_002.cif
_cod_data_source_block           is_ag459
_cod_depositor_comments
;Adding full bibliography for
 ./tmp-cod-update-bibliographies-12971/cifs/4029236.cif.
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4029236