Asymmetric Total Synthesis of (-)-Arborisidine and (-)-19-epi-Arborisidine Enabled by a Catalytic Enantioselective Pictet-Spengler Reaction.
Andres, Rémi; Wang, Qian; Zhu, Jieping; Journal of the American Chemical Society  (2020) –; doi:10.1021/jacs.0c05804

data_4135131
_publ_section_title
;
 Asymmetric Total Synthesis of (-)-Arborisidine and
 (-)-19-epi-Arborisidine Enabled by a Catalytic Enantioselective
 Pictet-Spengler Reaction.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.0c05804
_journal_year                    2020
_chemical_formula_moiety         'C20 H26 N2 O3'
_chemical_formula_sum            'C20 H26 N2 O3'
_chemical_formula_weight         342.43
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2019-04-08
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 91.898(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.5830(3)
_cell_length_b                   22.1488(6)
_cell_length_c                   7.6644(2)
_cell_measurement_reflns_used    9821
_cell_measurement_temperature    139.99(10)
_cell_measurement_theta_max      32.2340
_cell_measurement_theta_min      3.4550
_cell_volume                     1795.56(8)
_computing_cell_refinement       'CrysAlisPro 1.171.40.20a (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.40.20a (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.40.20a (Rigaku OD, 2018)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      139.99(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 5.2817
_diffrn_detector_type            AtlasS2
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.928
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
--------------------------------------------------------------------------
  1  \w    -13.00  41.00   1.00    5.50    --   19.91  77.00   0.00   54
  2  \w      4.00 100.00   1.00    5.50    --   19.91  19.00-180.00   96
  3  \w     -5.00  93.00   1.00    5.50    --   19.91  38.00 -90.00   98
  4  \w   -107.00 -63.00   1.00    5.50    --  -20.22 178.00  30.00   44
  5  \w    -89.00  10.00   1.00    5.50    --  -20.22 -77.00  30.00   99
  6  \w    -74.00 -48.00   1.00    5.50    --  -20.22 -38.00 -90.00   26
  7  \w   -107.00 -82.00   1.00    5.50    --  -20.22 178.00 120.00   25
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at home/near, AtlasS2'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0156878000
_diffrn_orient_matrix_UB_12      -0.0075576000
_diffrn_orient_matrix_UB_13      0.0880103000
_diffrn_orient_matrix_UB_21      0.0585986000
_diffrn_orient_matrix_UB_22      -0.0119800000
_diffrn_orient_matrix_UB_23      -0.0260847000
_diffrn_orient_matrix_UB_31      0.0285669000
_diffrn_orient_matrix_UB_32      0.0287186000
_diffrn_orient_matrix_UB_33      0.0122785000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0330
_diffrn_reflns_av_unetI/netI     0.0325
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.928
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -33
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            24114
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.928
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         32.938
_diffrn_reflns_theta_min         2.663
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.479
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.40.20a (Rigaku Oxford Diffraction, 2018).
 Numerical absorption correction based on Gaussian integration over
 a multifaceted crystal model.
 Empirical absorption correction using spherical harmonics
 as implemented in SCALE3 ABSPACK scaling algorithm
;
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_description       prism
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.359
_exptl_crystal_size_mid          0.242
_exptl_crystal_size_min          0.184
_refine_diff_density_max         0.406
_refine_diff_density_min         -0.258
_refine_diff_density_rms         0.048
_refine_ls_extinction_coef       0.0040(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         6246
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0569
_refine_ls_R_factor_gt           0.0439
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0546P)^2^+0.4583P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1092
_refine_ls_wR_factor_ref         0.1183
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5055
_reflns_number_total             6246
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c05804_si_010.cif
_cod_data_source_block           randres-2rat137crude
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Gaussian' was
changed to 'gaussian' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_cell_volume        1795.54(9)
_cod_database_code               4135131
_shelx_shelxl_version_number     2018/3
_audit_contact_author            'Farzaneh Fadaei Tirani'
_chemical_oxdiff_formula         'C20 H26 N2 O3'
_reflns_odcompleteness_completeness 99.93
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     30.44
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C4(H4A,H4B)
2.c Aromatic/amide H refined with riding coordinates:
 C12(H12), C13(H13), C14(H14), C15(H15)
2.d Idealised Me refined as rotating group:
 C8(H8A,H8B,H8C), C9(H9A,H9B,H9C), C18(H18A,H18B,H18C), C19(H19A,H19B,H19C),
 C20(H20A,H20B,H20C)
;
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
- Detector area scaling
- B-factor correction
;
_oxdiff_exptl_absorpt_empirical_full_max 1.220
_oxdiff_exptl_absorpt_empirical_full_min 0.814