Diastereoselective control of intramolecular aza-Michael reactions using achiral catalysts.
Zhong, Cheng; Wang, Yikai; Hung, Alvin W.; Schreiber, Stuart L.; Young, Damian W.; Organic letters 13 (2011) 5556–5559; doi:10.1021/ol202276h

data_1502508
_publ_section_title
;
 Diastereoselective control of intramolecular aza-Michael reactions using
 achiral catalysts.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              5556
_journal_page_last               5559
_journal_paper_doi               10.1021/ol202276h
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_sum            'C44 H52 N4 O8'
_chemical_formula_weight         764.90
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.3717(2)
_cell_length_b                   16.0215(3)
_cell_length_c                   24.5159(4)
_cell_measurement_reflns_used    9167
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      65.6
_cell_measurement_theta_min      2.78
_cell_volume                     4073.81(13)
_computing_cell_refinement       'SAINT 7.46A (Bruker-AXS, 2009)'
_computing_data_collection       'APEX2 v2009.3.0 (Bruker-AXS, 2009)'
_computing_data_reduction        'SAINT 7.46A (Bruker-AXS, 2009)'
_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 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0437
_diffrn_reflns_av_sigmaI/netI    0.0143
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            102075
_diffrn_reflns_theta_full        66.40
_diffrn_reflns_theta_max         66.40
_diffrn_reflns_theta_min         3.30
_exptl_absorpt_coefficient_mu    0.698
_exptl_absorpt_correction_T_max  0.9209
_exptl_absorpt_correction_T_min  0.8503
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.247
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       brock
_exptl_crystal_F_000             1632
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.142
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.059
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     515
_refine_ls_number_reflns         7039
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0270
_refine_ls_R_factor_gt           0.0268
_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^)+(0.0375P)^2^+0.8539P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0678
_refine_ls_wR_factor_ref         0.0680
_reflns_number_gt                6973
_reflns_number_total             7039
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol202276h_si_004.cif
_cod_data_source_block           Cheng1
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               1502508