Enantioselective Synthesis of Hydantoin and Diketopiperazine-Fused Tetrahydroisoquinolines via Pictet-Spengler Reaction.
Liu, Shih-I; Haung, Jia-Yun; Barve, Indrajeet J.; Huang, Sheng-Cih; Sun, Chung-Ming; ACS combinatorial science 21 (2019) 336–344; doi:10.1021/acscombsci.9b00005

data_4514914
_publ_section_title
;
 Enantioselective Synthesis of Hydantoin and Diketopiperazine-Fused
 Tetrahydroisoquinolines via Pictet-Spengler Reaction.
;
_journal_issue                   4
_journal_name_full               'ACS combinatorial science'
_journal_page_first              336
_journal_page_last               344
_journal_paper_doi               10.1021/acscombsci.9b00005
_journal_volume                  21
_journal_year                    2019
_chemical_absolute_configuration rm
_chemical_formula_sum            'C19 H20 N2 O6'
_chemical_formula_weight         372.37
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/6
_cell_angle_alpha                90
_cell_angle_beta                 99.287(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.2378(4)
_cell_length_b                   8.6386(4)
_cell_length_c                   12.0226(6)
_cell_measurement_reflns_used    4499
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      66.5860
_cell_measurement_theta_min      3.7254
_cell_volume                     844.35(7)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.967
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0189
_diffrn_reflns_av_unetI/netI     0.0208
_diffrn_reflns_Laue_measured_fraction_full 0.967
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5827
_diffrn_reflns_point_group_measured_fraction_full 0.966
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         66.581
_diffrn_reflns_theta_min         3.725
_exptl_absorpt_coefficient_mu    0.922
_exptl_absorpt_correction_T_max  0.9492
_exptl_absorpt_correction_T_min  0.8597
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2014/4 (Bruker AXS Inc.)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.465
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       lamellar
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.187
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         2147
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0282
_refine_ls_R_factor_gt           0.0276
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0532P)^2^+0.1283P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0731
_refine_ls_wR_factor_ref         0.0738
_reflns_Friedel_coverage         0.865
_reflns_Friedel_fraction_full    0.966
_reflns_Friedel_fraction_max     0.994
_reflns_number_gt                2108
_reflns_number_total             2147
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            co9b00005_si_003.cif
_cod_data_source_block           cu_170252LT_Cu_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_database_code               4514914
_shelxl_version_number           2014/6
_shelx_res_checksum              65252
_shelx_hkl_checksum              69251