Bispalladacycle-Catalyzed Brønsted Acid/Base-Promoted Asymmetric Tandem Azlactone Formation-Michael Addition
Manuel Weber; Sascha Jautze; Wolfgang Frey; René Peters; Journal of the American Chemical Society 132 (2010) 12222–12225; doi:10.1021/ja106088v

data_4103030
_publ_section_title
;
 Bispalladacycle-Catalyzed Br\/onsted Acid/Base-Promoted Asymmetric Tandem
 Azlactone Formation-Michael Addition
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12222
_journal_page_last               12225
_journal_paper_doi               10.1021/ja106088v
_journal_volume                  132
_journal_year                    2010
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C26 H23 N O3'
_chemical_formula_sum            'C26 H23 N O3'
_chemical_formula_weight         397.45
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 98.090(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.5548(16)
_cell_length_b                   6.4174(10)
_cell_length_c                   15.7227(19)
_cell_measurement_reflns_used    36
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      13
_cell_measurement_theta_min      11
_cell_volume                     1054.4(3)
_computing_cell_refinement       'Siemens P3/PC Data Collection System'
_computing_data_collection       'Siemens P3/PC Data Collection System'
_computing_data_reduction        'SHELXTL-plus XDISK (Sheldrick, 1991)'
_computing_molecular_graphics    'SHELXTL-plus, XP (Sheldrick, 1991)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Nicolet P3'
_diffrn_measurement_method       Wyckoff-Scan
_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  0.0199
_diffrn_reflns_av_sigmaI/netI    0.0426
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            5350
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         28.00
_diffrn_reflns_theta_min         1.95
_diffrn_standards_decay_%        2
_diffrn_standards_interval_count 50
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.154
_refine_diff_density_min         -0.133
_refine_diff_density_rms         0.031
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(14)
_refine_ls_extinction_coef       0.0164(17)
_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   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         5085
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0798
_refine_ls_R_factor_gt           0.0522
_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^)+(0.0343P)^2^+0.1913P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1033
_refine_ls_wR_factor_ref         0.1139
_reflns_number_gt                3803
_reflns_number_total             5085
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja106088v_si_001.cif
_cod_data_source_block           s1735rm
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4103030