Diastereoselective synthesis of novel aza-diketopiperazines via a domino cyclohydrocarbonylation/addition process
Pierre Regenass; Jean-Francois Margathe; Andre Mann; Jean Suffert; Marcel Hibert; Nicolas Girard; Dominique Bonnet; Chem.Commun. 50 (2014) 9657–; doi:10.1039/C4cc03660C

data_7115484
_publ_section_title
;
 Diastereoselective synthesis of novel aza-diketopiperazines via a domino
 cyclohydrocarbonylation/addition process
;
_journal_name_full               Chem.Commun.
_journal_page_first              9657
_journal_paper_doi               10.1039/C4cc03660C
_journal_volume                  50
_journal_year                    2014
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C18 H22 N4 O6'
_chemical_formula_sum            'C18 H22 N4 O6'
_chemical_formula_weight         390.39
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.9428(4)
_cell_length_b                   10.4945(4)
_cell_length_c                   21.4599(5)
_cell_measurement_reflns_used    6090
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      0.998
_cell_volume                     1788.81(12)
_computing_cell_refinement       'Denzo (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo (Nonius B.V., 1998)'
_computing_molecular_graphics    'PLATON 98 (Spek, 1998)'
_computing_publication_material  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0421
_diffrn_reflns_av_unetI/netI     0.0517
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            8526
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.979
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.456
_diffrn_reflns_theta_min         1.898
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.450
_exptl_crystal_description       block
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.388
_refine_diff_density_min         -0.384
_refine_diff_density_rms         0.135
_refine_ls_abs_structure_details
;
 Flack x determined using 1231 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.4(6)
_refine_ls_extinction_coef       0.065(6)
_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   1.124
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         4012
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.124
_refine_ls_R_factor_all          0.0615
_refine_ls_R_factor_gt           0.0447
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0628P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0994
_refine_ls_wR_factor_ref         0.1180
_reflns_Friedel_coverage         0.713
_reflns_Friedel_fraction_full    0.985
_reflns_Friedel_fraction_max     0.957
_reflns_number_gt                3296
_reflns_number_total             4012
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4cc03660c3.cif
_cod_data_source_block           mhpr140428
_cod_database_code               7115484
_shelxl_version_number           2013-4
_shelx_res_checksum              21698