Thermal 1,3-Trityl Migrations in Diels-Alder Domino Reactions of 1-Trityl-4-vinyl-1H-imidazoles
Lynsey J. Cotterill; Ross W. Harrington; William Clegg; Michael J. Hall; Journal of Organic Chemistry 75 (2010) 4604–4607; doi:10.1021/jo100416c

data_4025510
_publ_section_title
;
 Thermal 1,3-Trityl Migrations in Diels-Alder Domino Reactions of
 1-Trityl-4-vinyl-1H-imidazoles
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              4604
_journal_page_last               4607
_journal_paper_doi               10.1021/jo100416c
_journal_volume                  75
_journal_year                    2010
_chemical_formula_moiety         'C34 H27 N3 O2'
_chemical_formula_sum            'C34 H27 N3 O2'
_chemical_formula_weight         509.59
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                91.145(4)
_cell_angle_beta                 100.369(4)
_cell_angle_gamma                96.303(4)
_cell_formula_units_Z            4
_cell_length_a                   10.3238(5)
_cell_length_b                   15.5018(7)
_cell_length_c                   16.2068(8)
_cell_measurement_reflns_used    6725
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.5068
_cell_measurement_theta_min      2.7598
_cell_volume                     2533.8(2)
_computing_cell_refinement
;
'Fri Dec 04 16:52:33 2009'
;
_computing_data_collection
;
'Fri Dec 04 16:52:33 2009'
;
_computing_data_reduction
;
'Fri Dec 04 16:52:33 2009'
;
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 10.3968
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
'Oxford Diffraction Gemini A Ultra diffractometer'
_diffrn_measurement_method       'thick-slice \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube with Enhance optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0448
_diffrn_reflns_av_sigmaI/netI    0.0882
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            22724
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.77
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9753
_exptl_absorpt_correction_T_min  0.9720
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
'Fri Dec 04 16:52:33 2009'
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.336
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.237
_refine_diff_density_min         -0.184
_refine_diff_density_rms         0.039
_refine_ls_extinction_coef       0.0055(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   0.845
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     704
_refine_ls_number_reflns         8906
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.845
_refine_ls_R_factor_all          0.0795
_refine_ls_R_factor_gt           0.0392
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0363P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0757
_refine_ls_wR_factor_ref         0.0819
_reflns_number_gt                5341
_reflns_number_total             8906
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo100416c_si_004.cif
_cod_data_source_block           mjh16
_cod_database_code               4025510