Diels-Alder reactions of cyclic isoimidium salts.
Boeckman, Jr, Robert K; Miller, Yan; Ryder, Todd R.; Organic letters 12 (2010) 4524–4527; doi:10.1021/ol101831b

data_1556122
_publ_section_title
;
 Diels-Alder reactions of cyclic isoimidium salts.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              4524
_journal_page_last               4527
_journal_paper_doi               10.1021/ol101831b
_journal_volume                  12
_journal_year                    2010
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C26 H31 N O3'
_chemical_formula_sum            'C26 H31 N O3'
_chemical_formula_weight         405.52
_chemical_name_common            boeyz09
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_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                   8.5828(15)
_cell_length_b                   13.808(2)
_cell_length_c                   19.023(3)
_cell_measurement_reflns_used    3701
_cell_measurement_temperature    100.0(1)
_cell_measurement_theta_max      32.82
_cell_measurement_theta_min      2.60
_cell_volume                     2254.4(6)
_computing_cell_refinement       'SAINT, Bruker'
_computing_data_collection       'APEX2, Bruker'
_computing_data_reduction        'SAINT, Bruker'
_computing_molecular_graphics    'SHELXTL, Bruker'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97, CNR-IC'
_diffrn_ambient_temperature      100.0(1)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART APEX II CCD Platform'
_diffrn_measurement_method       'area detector, \w scans per \f'
_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  0.0382
_diffrn_reflns_av_sigmaI/netI    0.0204
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            40562
_diffrn_reflns_theta_full        32.57
_diffrn_reflns_theta_max         32.57
_diffrn_reflns_theta_min         1.82
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9877
_exptl_absorpt_correction_T_min  0.9698
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing, 1995'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.195
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             872
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.337
_refine_diff_density_min         -0.203
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     395
_refine_ls_number_reflns         4564
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0394
_refine_ls_R_factor_gt           0.0342
_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^)+(0.0607P)^2^+0.1472P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0875
_refine_ls_wR_factor_ref         0.0912
_reflns_number_gt                4172
_reflns_number_total             4564
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol101831b_si_002.cif
_cod_data_source_block           boeyz09
_cod_original_cell_volume        2254.5(6)
_cod_database_code               1556122