First Experimental and Theoretical Evidence of a Deactivating Enone Dienophile in the Transannular Diels-Alder Reaction
Élyse Bourque; Pierre Deslongchamps; Yves L. Dory; Journal of Organic Chemistry 68 (2003) 2390–2397; doi:10.1021/jo0265129

data_4022309
_publ_section_title
;
 First Experimental and Theoretical Evidence of a Deactivating
 Enone Dienophile in the Transannular Diels-Alder Reaction
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2390
_journal_page_last               2397
_journal_paper_doi               10.1021/jo0265129
_journal_volume                  68
_journal_year                    2003
_chemical_formula_moiety         'C27 H40 O8'
_chemical_formula_sum            'C27 H40 O8'
_chemical_formula_weight         492.59
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.000(5)
_cell_angle_beta                 96.130(5)
_cell_angle_gamma                90.000(5)
_cell_formula_units_Z            2
_cell_length_a                   5.993(5)
_cell_length_b                   19.071(5)
_cell_length_c                   12.063(5)
_cell_measurement_temperature    293(2)
_cell_volume                     1370.8(13)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0442
_diffrn_reflns_av_sigmaI/netI    0.0783
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2498
_diffrn_reflns_theta_full        65.03
_diffrn_reflns_theta_max         65.03
_diffrn_reflns_theta_min         3.69
_exptl_absorpt_coefficient_mu    0.713
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.193
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.306
_refine_diff_density_min         -0.241
_refine_diff_density_rms         0.064
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.005
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         2388
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.005
_refine_ls_R_factor_all          0.1384
_refine_ls_R_factor_gt           0.0816
_refine_ls_shift/su_max          0.018
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1319P)^2^+0.8950P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2042
_refine_ls_wR_factor_ref         0.2542
_reflns_number_gt                1401
_reflns_number_total             2388
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo0265129si20030204_031629_1.cif
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4022309