Enantioselective Synthesis of Functionalized Pyrazoles by NHC-Catalyzed Reaction of Pyrazolones with α,β-Unsaturated Aldehydes.
Yetra, Santhivardhana Reddy; Mondal, Santigopal; Suresh, Eringathodi; Biju, Akkattu T.; Organic letters 17 (2015) 1417–1420; doi:10.1021/acs.orglett.5b00293

data_1518996
_publ_section_title
;
 Enantioselective Synthesis of Functionalized Pyrazoles by NHC-Catalyzed
 Reaction of Pyrazolones with \a,\b-Unsaturated Aldehydes.
;
_journal_issue                   6
_journal_name_full               'Organic letters'
_journal_page_first              1417
_journal_page_last               1420
_journal_paper_doi               10.1021/acs.orglett.5b00293
_journal_volume                  17
_journal_year                    2015
_chemical_formula_sum            'C20 H20 N2 O3'
_chemical_formula_weight         336.38
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.8991(11)
_cell_length_b                   10.1513(11)
_cell_length_c                   17.5003(19)
_cell_measurement_reflns_used    3271
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.28
_cell_measurement_theta_min      2.32
_cell_volume                     1758.6(3)
_computing_cell_refinement       'BRUKER SMART'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    ORTEP
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'BRUKER SMARTAPEX CCD DIFFRACTOMETER'
_diffrn_measurement_method       'OMEGA-PHI SCAN'
_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  0.0346
_diffrn_reflns_av_sigmaI/netI    0.0437
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            9511
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.32
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.9863
_exptl_absorpt_correction_T_min  0.9688
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            COLOURLESS
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       BLOCKS
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.233
_refine_diff_density_min         -0.219
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.2(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.210
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         3445
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.210
_refine_ls_R_factor_all          0.0683
_refine_ls_R_factor_gt           0.0612
_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^)+(0.0492P)^2^+0.4182P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1235
_refine_ls_wR_factor_ref         0.1261
_reflns_number_gt                3200
_reflns_number_total             3445
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b00293_si_001.cif
_cod_data_source_block           phm
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'ORTHORHOMBIC' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN' changed to
'multi-scan' according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/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 3143 2015-03-26 13:38:13Z robertas 
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_cod_original_sg_symbol_H-M      P212121
_cod_database_code               1518996