Synthesis of Aza-Quaternary Centers via Pictet–Spengler Reactions of Ketonitrones
Lynch-Colameta, Tessa; Greta, Sarah; Snyder, Scott A.; Chemical Science  (2021) –; doi:10.1039/D1SC00882J

data_1561049
_publ_section_title
;
 Synthesis of Aza-Quaternary Centers via Pictet--Spengler Reactions of
 Ketonitrones
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D1SC00882J
_journal_year                    2021
_chemical_formula_moiety         'C19 H20 N2 O'
_chemical_formula_sum            'C19 H20 N2 O'
_chemical_formula_weight         292.37
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2019-09-11
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2021-02-02 deposited with the CCDC.	2021-03-12 downloaded from the CCDC.
;
_cell_angle_alpha                112.745(2)
_cell_angle_beta                 103.325(2)
_cell_angle_gamma                99.118(2)
_cell_formula_units_Z            2
_cell_length_a                   8.5841(6)
_cell_length_b                   10.1481(7)
_cell_length_c                   10.2458(8)
_cell_measurement_reflns_used    9914
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.50
_cell_measurement_theta_min      2.28
_cell_volume                     769.88(10)
_computing_cell_refinement       'SAINT V.8.35A (Bruker AXS Inc., 2013)'
_computing_data_collection       'APEX3 v.2015.9-0 (Bruker AXS Inc., 2015)'
_computing_data_reduction        'SAINT V.8.35A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics
;
OLEX2: a complete structure solution, refinement and analysis program 
Dolomanov et al., 2009

Mercury: visualization and analysis of crystal structures
Macrae, et al., 2006

O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann.
J. Appl. Cryst. (2009). 42, 339-341;

C. F. Macrae, P. R. Edgington, P. McCabe, E. Pidcock, G. P. Shields, R. Taylor,
M. Towler and J. van de Streek, J. Appl. Cryst. (2006). 39, 453-457.
;
_computing_publication_material
;
 APEX3 v.2015.5-2 (Bruker AXS Inc., 2015)
 OLEX2 (Dolomanov et al., 2009)
;
_computing_structure_refinement  'XL-2018/3 (Sheldrick, 2015b)'
_computing_structure_solution    'XT 2018/2 (Sheldrick, 2015a)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'Bruker PHOTON 100'
_diffrn_detector_area_resol_mean 10.4167
_diffrn_detector_type            CMOS
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  mirrors
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0470
_diffrn_reflns_av_unetI/netI     0.0339
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            28347
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.614
_diffrn_reflns_theta_min         2.264
_diffrn_source                   'micro-focus X-ray tube'
_diffrn_source_type              'INCOATEC ImuS'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6703
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. 
wR2(int) was 0.0980 before and 0.0565 after correction. 
The Ratio of minimum to maximum transmission is 0.8989.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.261
_exptl_crystal_description       block
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.6
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.390
_refine_diff_density_min         -0.188
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3937
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0654
_refine_ls_R_factor_gt           0.0453
_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^)+(0.0529P)^2^+0.3098P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1035
_refine_ls_wR_factor_ref         0.1129
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3090
_reflns_number_total             3937
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1sc00882j2.cif
_cod_data_source_block           0812_t
_cod_database_code               1561049
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.988
_shelx_estimated_absorpt_t_min   0.954
_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. Restrained distances
 N1-H1A
 0.84 with sigma of 0.01
 H1-H1_$1
 2.3 with sigma of 0.02
3.a Ternary CH refined with riding coordinates:
 C9(H9)
3.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B)
3.c Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C15(H15), C16(H16), C17(H17), C18(H18),
 C19(H19)
3.d Idealised Me refined as rotating group:
 C10(H10A,H10B,H10C), C13(H13A,H13B,H13C)
;
_shelx_res_checksum              44581
_shelx_hkl_checksum              95878
_olex2_submission_special_instructions 'No special instructions were received'