Access to novel imidazo[1,5-a]pyrazine scaffolds by the combined use of a three-component reaction and a base-assisted intramolecular cyclization.
Attanasi, Orazio A.; Favi, Gianfranco; Giorgi, Gianluca; Majer, Roberta; Perrulli, Francesca Romana; Santeusanio, Stefania; Organic & biomolecular chemistry 12 (2014) 4610–4619; doi:10.1039/c4ob00676c

data_7153845
_publ_section_title
;
 Access to novel imidazo[1,5-a]pyrazine scaffolds by the combined use of a
 three-component reaction and a base-assisted intramolecular cyclization.
;
_journal_issue                   26
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4610
_journal_page_last               4619
_journal_paper_doi               10.1039/c4ob00676c
_journal_volume                  12
_journal_year                    2014
_chemical_formula_moiety         'C15 H19 N5 O2 S, C2 H6 O'
_chemical_formula_sum            'C17 H25 N5 O3 S'
_chemical_formula_weight         379.48
_chemical_name_systematic
;
(E)-2-(1-(5-oxo-1-phenyl-3-propyl-2-thioxoimidazolidin-4-yl)ethylidene)-
hydrazinecarboxamide x ethanol
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
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_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                105.766(3)
_cell_angle_beta                 98.497(4)
_cell_angle_gamma                99.551(3)
_cell_formula_units_Z            2
_cell_length_a                   8.4371(3)
_cell_length_b                   8.7423(3)
_cell_length_c                   14.5956(7)
_cell_measurement_reflns_used    3701
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.9981
_cell_measurement_theta_min      2.4661
_cell_volume                     1000.39(7)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55
;
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.0827
_diffrn_measured_fraction_theta_full 0.842
_diffrn_measured_fraction_theta_max 0.842
_diffrn_measurement_device_type  'Xcalibur, Sapphire3'
_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  0.0128
_diffrn_reflns_av_sigmaI/netI    0.0327
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            7394
_diffrn_reflns_theta_full        29.07
_diffrn_reflns_theta_max         29.07
_diffrn_reflns_theta_min         2.47
_exptl_absorpt_coefficient_mu    0.188
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.97537
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
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CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.52 (release 06-11-2009 CrysAlis171 .NET)
(compiled Nov 6 2009,16:24:50)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_density_diffrn    1.260
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             404
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.230
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.006
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         4508
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0655
_refine_ls_R_factor_gt           0.0429
_refine_ls_shift/su_max          0.033
_refine_ls_shift/su_mean         0.009
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0744P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1175
_refine_ls_wR_factor_ref         0.1247
_reflns_number_gt                3070
_reflns_number_total             4508
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c4ob00676c2.cif
_cod_data_source_block           atta_b
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/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 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 7153845.cif.
;
_cod_database_code               7153845