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_4028856
_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            'C25 H26 N2 O7'
_chemical_formula_weight         466.48
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   none
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 104.44(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.755(3)
_cell_length_b                   16.362(3)
_cell_length_c                   10.483(2)
_cell_measurement_reflns_used    17599
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      25.05
_cell_measurement_theta_min      2.49
_cell_volume                     2284.8(8)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_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  0.0535
_diffrn_reflns_av_sigmaI/netI    0.0354
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            17599
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         2.49
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_T_max  0.9921
_exptl_absorpt_correction_T_min  0.9755
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB,RIGAKU/MSC,The Woodlands,TX,USA,1999.'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.356
_exptl_crystal_description       column
_exptl_crystal_F_000             984
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.666
_refine_diff_density_min         -0.592
_refine_diff_density_rms         0.060
_refine_ls_extinction_coef       none
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.098
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         4031
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0904
_refine_ls_R_factor_gt           0.0731
_refine_ls_shift/su_max          0.325
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1218P)^2^+1.5169P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1981
_refine_ls_wR_factor_ref         0.2260
_reflns_number_gt                3164
_reflns_number_total             4031
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo402075d_si_005.cif
_cod_data_source_block           C25H26N2O7
_cod_original_cell_volume        2284.7(8)
_cod_database_code               4028856