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_4105006
_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_formula_moiety         'C21 H27 N O2 S'
_chemical_formula_sum            'C21 H27 N O2 S'
_chemical_formula_weight         357.5
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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             2009-04-01T16:04:46-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 112.7600(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.1791(2)
_cell_length_b                   21.9773(5)
_cell_length_c                   8.8795(2)
_cell_measurement_reflns_used    9842
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.20
_cell_measurement_theta_min      2.65
_cell_measurement_wavelength     0.71073
_cell_volume                     1831.75(7)
_computing_cell_refinement       'APPEX2 (BRUKER AXS, 2005)'
_computing_data_collection       'APPEX2 (BRUKER AXS, 2005)'
_computing_data_reduction        'APPEX2 (BRUKER AXS, 2005)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-97  (Giacovazzo et all, 1999'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'BRUKER APPEX-II CCD'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0345
_diffrn_reflns_av_unetI/netI     0.0201
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            54197
_diffrn_reflns_theta_full        27.1
_diffrn_reflns_theta_max         27.1
_diffrn_reflns_theta_min         1.85
_exptl_absorpt_coefficient_mu    0.191
_exptl_absorpt_correction_T_max  0.959
_exptl_absorpt_correction_T_min  0.867
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.296
_exptl_crystal_description       prism
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.279
_refine_diff_density_min         -0.395
_refine_diff_density_rms         0.046
_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     270
_refine_ls_number_reflns         4038
_refine_ls_number_restraints     229
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0489
_refine_ls_R_factor_gt           0.0386
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0438P)^2^+1.0184P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0937
_refine_ls_wR_factor_ref         0.0992
_reflns_number_gt                3429
_reflns_number_total             4038
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ja905415r_si_3f.cif
_cod_data_source_block           lm01fo1n
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4105006