Asymmetric Domino Aza-Michael Addition/[3 + 2] Cycloaddition Reactions as a Versatile Approach to α,β,γ-Triamino Acid Derivatives.
Kapras, Vojtěch; Pohl, Radek; Císařová, Ivana; Jahn, Ullrich; Organic letters 16 (2014) 1088–1091; doi:10.1021/ol403660w

data_1513441
_publ_section_title
;
 Asymmetric Domino Aza-Michael Addition/[3 + 2] Cycloaddition Reactions as
 a Versatile Approach to \a,\b,\g-Triamino Acid Derivatives.
;
_journal_issue                   4
_journal_name_full               'Organic letters'
_journal_page_first              1088
_journal_page_last               1091
_journal_paper_doi               10.1021/ol403660w
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_compound_source        'synthesized by the authors'
_chemical_formula_moiety         'C20 H29 N3 O2'
_chemical_formula_sum            'C20 H29 N3 O2'
_chemical_formula_weight         343.46
_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   difmap
_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                   10.1265(2)
_cell_length_b                   10.6178(2)
_cell_length_c                   18.0640(3)
_cell_measurement_reflns_used    7754
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.22
_cell_volume                     1942.26(6)
_computing_cell_refinement       'SAINT V8.27B (Bruker AXS Inc., 2012)'
_computing_data_collection       'Bruker Instrument Service v2012.12.0.0'
_computing_data_reduction        'SAINT V8.27B (Bruker AXS Inc., 2012)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0189
_diffrn_reflns_av_sigmaI/netI    0.0224
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            15309
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.22
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9813
_exptl_absorpt_correction_T_min  0.9496
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2012/1 (Bruker AXS Inc.)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.175
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.68
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.198
_refine_diff_density_min         -0.207
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.2(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     231
_refine_ls_number_reflns         4454
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0392
_refine_ls_R_factor_gt           0.0341
_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^)+(0.0473P)^2^+0.1949P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0817
_refine_ls_wR_factor_ref         0.0847
_reflns_number_gt                4057
_reflns_number_total             4454
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ol403660w_si_003.cif
_cod_data_source_block           vk_703_ii_jahn_uochb
_cod_database_code               1513441