A Convenient Route to Enantiopure 3-Aryl-2,3-diaminopropanoic Acids by Diastereoselective Mannich Reaction of Camphor-Based Tricyclic Iminolactone with Imines
Huan-Huan Zhang; Xiu-Qin Hu; Xiao Wang; Yong-Chun Luo; Peng-Fei Xu; Journal of Organic Chemistry 73 (2008) 3634–3637; doi:10.1021/jo8001408

data_4023388
_publ_section_title
;
 A Convenient Route to Enantiopure 3-Aryl-2,3-diaminopropanoic Acids
 by Diastereoselective Mannich Reaction of Camphor-Based Tricyclic
 Iminolactone with Imines
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3634
_journal_page_last               3637
_journal_paper_doi               10.1021/jo8001408
_journal_volume                  73
_journal_year                    2008
_chemical_absolute_configuration rmad
_chemical_formula_sum            'C27 H32 N2 O4 S'
_chemical_formula_weight         480.61
_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                 90.762(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.4320(12)
_cell_length_b                   15.4131(16)
_cell_length_c                   14.3198(15)
_cell_measurement_reflns_used    4882
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      2.22
_cell_volume                     2523.0(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0259
_diffrn_reflns_av_sigmaI/netI    0.0441
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            13146
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         1.42
_exptl_absorpt_coefficient_mu    0.164
_exptl_absorpt_correction_T_max  0.9618
_exptl_absorpt_correction_T_min  0.9286
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.221
_refine_diff_density_min         -0.259
_refine_diff_density_rms         0.069
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.03(6)
_refine_ls_extinction_coef       0.0452(14)
_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   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     623
_refine_ls_number_reflns         8388
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0607
_refine_ls_R_factor_gt           0.0407
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0494P)^2^+0.3430P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0903
_refine_ls_wR_factor_ref         0.1022
_reflns_number_gt                6626
_reflns_number_total             8388
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo8001408-File006.cif
_cod_data_source_block           4c
_cod_depositor_comments
;
The following automatic conversions were performed:
'_chemical_absolute_configuration' value 'RMAD' changed to 'rmad'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_symmetry_cell_setting' value 'Monoclinic' changed to
'monoclinic' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN' changed
to 'multi-scan' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_hydrogen_treatment' value 'CONSTR' changed to
'constr' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'NONE' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4023388