Catalytic Regioselectivity Control in Ring-Opening Cycloisomerization of Methylene- or Alkylidenecyclopropyl Ketones
Shengming Ma; Lianghua Lu; Junliang Zhang; Journal of the American Chemical Society 126 (2004) 9645–9660; doi:10.1021/ja0494860

data_4112839
_publ_section_title
;
 Catalytic Regioselectivity Control in Ring-Opening Cycloisomerization of
 Methylene- or Alkylidenecyclopropyl Ketones
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9645
_journal_page_last               9660
_journal_paper_doi               10.1021/ja0494860
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'C16 H22 O4 S'
_chemical_formula_weight         310.40
_chemical_name_systematic
; 
 ? 
;
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.494(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.931(4)
_cell_length_b                   8.4053(16)
_cell_length_c                   10.938(2)
_cell_measurement_reflns_used    2234
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      51.089
_cell_measurement_theta_min      4.557
_cell_volume                     1643.5(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      293(2)
_diffrn_measured_fraction_theta_full 0.934
_diffrn_measured_fraction_theta_max 0.934
_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  0.0457
_diffrn_reflns_av_sigmaI/netI    0.0587
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            9438
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         1.14
_exptl_absorpt_coefficient_mu    0.209
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6835
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.254
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.568
_refine_diff_density_min         -0.380
_refine_diff_density_rms         0.102
_refine_ls_extinction_coef       0.0091(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.976
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     198
_refine_ls_number_reflns         3824
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.978
_refine_ls_R_factor_all          0.1009
_refine_ls_R_factor_gt           0.0613
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0954P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1520
_refine_ls_wR_factor_ref         0.1734
_reflns_number_gt                2284
_reflns_number_total             3824
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0494860si20040203_125023.cif
_cod_data_source_block           9g
_cod_original_cell_volume        1643.5(5)
_cod_database_code               4112839