Preparation and Diels-Alder Chemistry of 4-Vinylimidazoles
Carl J. Lovely; Hongwang Du; Rasapalli Sivappa; Manojkumar R. Bhandari; Yong He; H. V. Rasika Dias; Journal of Organic Chemistry 72 (2007) 3741–3749; doi:10.1021/jo0626008

data_4022832
_publ_contact_author_address
;Department of Chemistry and Biochemistry
The University of Texas at Arlington
Arlington, Texas 76019-0065, USA
;
_publ_contact_author_email       dias@uta.edu
_publ_contact_author_fax         817-272-3808
_publ_contact_author_name        'Prof. H. V. R. Dias'
_publ_contact_author_phone       817-272-3813
_publ_section_title
;
 Preparation and Diels-Alder Chemistry of 4-Vinylimidazoles
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3741
_journal_page_last               3749
_journal_paper_doi               10.1021/jo0626008
_journal_volume                  72
_journal_year                    2007
_chemical_formula_sum            'C33 H28 N4 O4'
_chemical_formula_weight         544.59
_chemical_name_common            Compound-31f
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 101.92(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.2165(18)
_cell_length_b                   15.144(3)
_cell_length_c                   20.742(4)
_cell_measurement_reflns_used    41
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      18.38
_cell_measurement_theta_min      2.00
_cell_volume                     2832.5(9)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens 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 0.973
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_method       '\w scans'
_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  0.0213
_diffrn_reflns_av_sigmaI/netI    0.0462
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            4818
_diffrn_reflns_theta_full        22.50
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         2.01
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9715
_exptl_absorpt_correction_T_min  0.9553
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   Psi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.277
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       diamond
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.44
_exptl_crystal_size_min          0.34
_refine_diff_density_max         0.137
_refine_diff_density_min         -0.166
_refine_diff_density_rms         0.032
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     371
_refine_ls_number_reflns         3600
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0754
_refine_ls_R_factor_gt           0.0439
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0526P)^2^+0.4387P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0993
_refine_ls_wR_factor_ref         0.1146
_reflns_number_gt                2485
_reflns_number_total             3600
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo0626008si20070226_025108_2.cif
_cod_data_source_block           rd249
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4022832