Diastereoselective intermolecular ene reactions: synthesis of 4,5,6,7-tetrahydro-1H-benzo[d]imidazoles.
Watson, Lynsey J.; Harrington, Ross W.; Clegg, William; Hall, Michael J.; Organic & biomolecular chemistry 10 (2012) 6649–6655; doi:10.1039/c2ob26009c

data_7152543
_publ_section_title
;
 Diastereoselective intermolecular ene reactions: synthesis of
 4,5,6,7-tetrahydro-1H-benzo[d]imidazoles.
;
_journal_issue                   33
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              6649
_journal_page_last               6655
_journal_paper_doi               10.1039/c2ob26009c
_journal_volume                  10
_journal_year                    2012
_chemical_formula_moiety         'C22 H19 N3 O2'
_chemical_formula_sum            'C22 H19 N3 O2'
_chemical_formula_weight         357.40
_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                 100.967(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.9615(6)
_cell_length_b                   6.7669(2)
_cell_length_c                   19.4128(8)
_cell_measurement_reflns_used    3558
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26.57
_cell_measurement_theta_min      2.96
_cell_volume                     1800.55(12)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_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 0.961
_diffrn_measured_fraction_theta_max 0.908
_diffrn_measurement_device_type
'Oxford Diffraction Gemini A Ultra diffractometer'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  none
_diffrn_radiation_source         'sealed tube with Enhance optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0166
_diffrn_reflns_av_sigmaI/netI    0.0252
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            6118
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.63
_diffrn_reflns_theta_min         2.97
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.975
_exptl_absorpt_correction_T_min  0.966
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.318
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.224
_refine_diff_density_min         -0.206
_refine_diff_density_rms         0.037
_refine_ls_extinction_coef       0.0016(7)
_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   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         3455
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0500
_refine_ls_R_factor_gt           0.0402
_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^)+(0.0398P)^2^+0.8073P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0952
_refine_ls_wR_factor_ref         0.1020
_reflns_number_gt                2894
_reflns_number_total             3455
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c2ob26009c.txt
_cod_data_source_block           mjh65_compound_7a_rearomatised
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7152543