Z- and Enantioselective Ring-Opening/Cross-Metathesis with Enol Ethers Catalyzed by Stereogenic-at-Ru Carbenes: Reactivity, Selectivity, and Curtin-Hammett Kinetics
R. Kashif M. Khan; Robert V. O'Brien; Sebastian Torker; Bo Li; Amir H. Hoveyda; Journal of the American Chemical Society 134 (2012) 12774–12779; doi:10.1021/ja304827a

data_4118427
_publ_section_title
;
 Z- and Enantioselective Ring-Opening/Cross-Metathesis with Enol Ethers
 Catalyzed by Stereogenic-at-Ru Carbenes: Reactivity, Selectivity, and
 Curtin-Hammett Kinetics
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12774
_journal_page_last               12779
_journal_paper_doi               10.1021/ja304827a
_journal_volume                  134
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C19 H19 Br O3'
_chemical_formula_sum            'C19 H19 Br O3'
_chemical_formula_weight         375.25
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 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                 118.196(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   23.6367(8)
_cell_length_b                   4.8124(2)
_cell_length_c                   16.9657(6)
_cell_measurement_reflns_used    5661
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      66.49
_cell_measurement_theta_min      3.86
_cell_volume                     1700.83(12)
_computing_cell_refinement       'SAINT (Bruker, 2010)'
_computing_data_collection       'APEX2 (Bruker, 2010)'
_computing_data_reduction        'SAINT (Bruker, 2010)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'Bruker Kappa DUO CCD diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0485
_diffrn_reflns_av_sigmaI/netI    0.0460
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            9872
_diffrn_reflns_theta_full        66.63
_diffrn_reflns_theta_max         66.63
_diffrn_reflns_theta_min         3.86
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_type              'Incoatec I\uS'
_exptl_absorpt_coefficient_mu    3.394
_exptl_absorpt_correction_T_max  0.9352
_exptl_absorpt_correction_T_min  0.7971
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G.M. (2008). SADABS v2008/1. Bruker AXS Inc. Madison, WI USA.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.465
_exptl_crystal_density_method    none
_exptl_crystal_description       block
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.07
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.272
_refine_diff_density_min         -0.343
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(2)
_refine_ls_extinction_coef       na
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     211
_refine_ls_number_reflns         2865
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0409
_refine_ls_R_factor_gt           0.0331
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0244P)^2^+1.2433P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0702
_refine_ls_wR_factor_ref         0.0736
_reflns_number_gt                2525
_reflns_number_total             2865
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja304827a_si_002.cif
_cod_data_source_block           C19H19BrO3
_cod_original_cell_volume        1700.83(11)
_cod_original_sg_symbol_H-M      'C 2'
_cod_database_code               4118427