Gold-Catalyzed [4C+2C] Cycloadditions of Allenedienes, including an Enantioselective Version with New Phosphoramidite-Based Catalysts: Mechanistic Aspects of the Divergence between [4C+3C] and [4C+2C] Pathways
Isaac Alonso; Beatriz Trillo; Fernando López; Sergi Montserrat; Gregori Ujaque; Luis Castedo; Agustí Lledós; Jose L. Mascareñas; Journal of the American Chemical Society 131 (2009) 13020–13030; doi:10.1021/ja905415r

data_4105009
_publ_section_title
;
 Gold-Catalyzed [4C+2C] Cycloadditions of Allenedienes, including an
 Enantioselective Version with New Phosphoramidite-Based Catalysts:
 Mechanistic Aspects of the Divergence between [4C+3C] and [4C+2C]
 Pathways
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13020
_journal_page_last               13030
_journal_paper_doi               10.1021/ja905415r
_journal_volume                  131
_journal_year                    2009
_chemical_absolute_configuration ad
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C18 H23 N O2 S'
_chemical_formula_sum            'C18 H23 N O2 S'
_chemical_formula_weight         317.44
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2009-04-29T11:29:13-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   11.5779(6)
_cell_length_b                   12.8146(8)
_cell_length_c                   21.8090(14)
_cell_measurement_reflns_used    1845
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      23.66
_cell_measurement_theta_min      2.45
_cell_measurement_wavelength     0.71073
_cell_volume                     3235.7(3)
_computing_cell_refinement       'APEX2 v2009-3.0 (BRUKER AXS, Madison, 2009)'
_computing_data_collection       'APEX2 v2009-3.0 (BRUKER AXS, Madison, 2009)'
_computing_data_reduction        'APEX2 v2009-3.0 (BRUKER AXS, Madison, 2009)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR97 (Altomare et al., 1998)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker X8 kappa APEXII CCD'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0599
_diffrn_reflns_av_unetI/netI     0.0587
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            25747
_diffrn_reflns_theta_full        26.42
_diffrn_reflns_theta_max         26.42
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.207
_exptl_absorpt_correction_T_max  0.984
_exptl_absorpt_correction_T_min  0.872
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER AXS - SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.303
_exptl_crystal_description       prism
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.256
_refine_diff_density_min         -0.316
_refine_diff_density_rms         0.052
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     413
_refine_ls_number_reflns         6633
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0653
_refine_ls_R_factor_gt           0.0444
_refine_ls_shift/su_max          0.042
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0439P)^2^+0.7662P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0934
_refine_ls_wR_factor_ref         0.1028
_reflns_number_gt                5361
_reflns_number_total             6633
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ja905415r_si_enantio3d.cif
_cod_data_source_block           lm04ik1n
_cod_database_code               4105009