Diastereoselective Rhodium-Catalyzed Ene-Cycloisomerization Reactions of Alkenylidenecyclopropanes: Total Synthesis of (-)-α-Kainic Acid
P. Andrew Evans; Phillip A. Inglesby; Journal of the American Chemical Society 134 (2012) 3635–3638; doi:10.1021/ja210804r

data_4117558
_publ_section_title
;
 Diastereoselective Rhodium-Catalyzed Ene-Cycloisomerization Reactions of
 Alkenylidenecyclopropanes: Total Synthesis of (-)-\a-Kainic Acid
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              3635
_journal_page_last               3638
_journal_paper_doi               10.1021/ja210804r
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C16 H21 N O2 S'
_chemical_formula_weight         291.40
_chemical_name_common            work
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.5542(5)
_cell_length_b                   11.5548(4)
_cell_length_c                   18.0747(7)
_cell_measurement_temperature    100(2)
_cell_volume                     3039.64(19)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_collection       'SMART v.5.632 (Bruker, 2005)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker D8 diffractometer with APEX detector'
_diffrn_measurement_method       '\w scans with a narrow frame width'
_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  0.0253
_diffrn_reflns_av_sigmaI/netI    0.0159
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            26912
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.25
_exptl_absorpt_coefficient_mu    0.214
_exptl_absorpt_correction_T_max  0.9524
_exptl_absorpt_correction_T_min  0.9230
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008-1 (Sheldrick, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.274
_exptl_crystal_description       prism
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.317
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     183
_refine_ls_number_reflns         3458
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.067
_refine_ls_R_factor_all          0.0349
_refine_ls_R_factor_gt           0.0321
_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^)+(0.0385P)^2^+1.5033P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0836
_refine_ls_wR_factor_ref         0.0858
_reflns_number_gt                3197
_reflns_number_total             3458
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja210804r_si_003.cif
_cod_data_source_block
C:\frames\PAEvans\PInglesby\PI-XVI-29\work\pixvi29.CIF
_cod_database_code               4117558