Asymmetric vinylogous Michael reaction of cyclic enones with silyloxy furans
Amol P. Jadhav; V. U. Bhaskara Rao; Pradeep Singh; R. G. Gonnade; Ravi P. Singh; Chem.Commun. 51 (2015) 13941–; doi:10.1039/C5cc05617A

data_7117717
_publ_section_title
;
 Asymmetric vinylogous Michael reaction of cyclic enones with silyloxy
 furans
;
_journal_name_full               Chem.Commun.
_journal_page_first              13941
_journal_paper_doi               10.1039/C5cc05617A
_journal_volume                  51
_journal_year                    2015
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C14 H20 O2 S2'
_chemical_formula_sum            'C14 H20 O2 S2'
_chemical_formula_weight         284.42
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_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
_audit_update_record
;
2015-07-08 deposited with the CCDC.
2015-07-23 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.1194(14)
_cell_length_b                   11.6313(16)
_cell_length_c                   12.1672(17)
_cell_measurement_temperature    273(2)
_cell_volume                     1432.1(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      273(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0507
_diffrn_reflns_av_sigmaI/netI    0.0405
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            13875
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.42
_exptl_absorpt_coefficient_mu    0.364
_exptl_absorpt_correction_T_max  0.957
_exptl_absorpt_correction_T_min  0.926
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2000)'
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.319
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             608.0
_exptl_crystal_size_max          0.211
_exptl_crystal_size_mid          0.178
_exptl_crystal_size_min          0.122
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.163
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.07(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         2511
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0451
_refine_ls_R_factor_gt           0.0404
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0497P)^2^+0.0414P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0890
_refine_ls_wR_factor_ref         0.0910
_reflns_number_gt                2277
_reflns_number_total             2511
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5cc05617a2.cif
_cod_data_source_block           3mem
_cod_original_sg_symbol_Hall     P2ac2ab
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7117717