Regio- and Stereocontrol in the Michael-Initiated Ring-Closure Reactions of γ,δ-Epoxy-α,β-unsaturated Esters, Ketones, Sulfones, and Amides
Ramesh C. Dhakal; R. Karl Dieter; Journal of Organic Chemistry 78 (2013) 12426–12439; doi:10.1021/jo402075d

data_4028854
_publ_section_title
;
 Regio- and Stereocontrol in the Michael-Initiated Ring-Closure Reactions
 of \g,\d-Epoxy-\a,\b-unsaturated Esters, Ketones, Sulfones, and Amides
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              12426
_journal_page_last               12439
_journal_paper_doi               10.1021/jo402075d
_journal_volume                  78
_journal_year                    2013
_chemical_formula_sum            'C24 H24 N4 O12'
_chemical_formula_weight         560.47
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 94.103(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   27.518(8)
_cell_length_b                   6.7633(13)
_cell_length_c                   30.912(7)
_cell_measurement_reflns_used    3817
_cell_measurement_temperature    188(2)
_cell_measurement_theta_max      26.3981
_cell_measurement_theta_min      2.9369
_cell_volume                     5738(2)
_computing_cell_refinement       'CrystalClear (Rigaku/MSC,2006)'
_computing_data_collection       'CrystalClear (Rigaku/MSC,2006)'
_computing_data_reduction        'CrystalClear (Rigaku/MSC,2006)'
_computing_molecular_graphics    'SHELXTL 6.10 (Sheldrick,2008)'
_computing_publication_material  'SHELXTL 6.10 (Sheldrick,2008)'
_computing_structure_refinement  'SHELXTL 6.10 (Sheldrick,2008)'
_computing_structure_solution    'SHELXTL 6.10 (Sheldrick,2008)'
_diffrn_ambient_temperature      188(2)
_diffrn_detector_area_resol_mean 14.9365
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_details
;
scan:
    Number of images: 260
               Slice: -40.0000 - 90.0000
         Image width: 0.5000
            Exp time: 75.0000
       Rotation axis: Omega
               Omega: 0.0000
                 Chi: 45.0000
                 Phi: 0.0000
                 XTD: 26.9931
              2theta: 0.0011
scan:
    Number of images: 220
               Slice: -30.0000 - 80.0000
         Image width: 0.5000
            Exp time: 75.0000
       Rotation axis: Omega
               Omega: 0.0000
                 Chi: 45.0000
                 Phi: 90.0000
                 XTD: 26.9931
              2theta: 0.0011

;
_diffrn_measurement_device
;
Mercury 1K CCD
;
_diffrn_measurement_device_details
;
AFC8: Eulerian 3 circle
;
_diffrn_measurement_method       omega
_diffrn_radiation_detector       CCD
_diffrn_radiation_monochromator  'Graphite Monochromator'
_diffrn_radiation_source         'Sealed Tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1125
_diffrn_reflns_av_sigmaI/netI    0.0925
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            19088
_diffrn_reflns_reduction_process 'Lp corrections applied'
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.94
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  0.9978
_exptl_absorpt_correction_T_min  0.9365
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R., (1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.297
_exptl_crystal_description       plate
_exptl_crystal_F_000             2336
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.475
_refine_diff_density_min         -0.419
_refine_diff_density_rms         0.103
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     363
_refine_ls_number_reflns         5043
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.1621
_refine_ls_R_factor_gt           0.1071
_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^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2764
_refine_ls_wR_factor_ref         0.3373
_reflns_number_gt                2716
_reflns_number_total             5043
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo402075d_si_003.cif
_cod_data_source_block           shelxl
_cod_database_code               4028854