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_1561048
_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 H17 N3 O'
_chemical_formula_sum            'C19 H17 N3 O'
_chemical_formula_weight         303.35
_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             2019-09-16
_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                90
_cell_angle_beta                 102.416(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.5899(4)
_cell_length_b                   18.3551(8)
_cell_length_c                   10.2741(5)
_cell_measurement_reflns_used    9984
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.47
_cell_measurement_theta_min      2.31
_cell_volume                     1582.02(13)
_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 0.974
_diffrn_measurement_device_type  'Bruker D8 Venture PHOTON 100 CMOS'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  mirrors
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0455
_diffrn_reflns_av_unetI/netI     0.0375
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.974
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            43653
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.974
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.612
_diffrn_reflns_theta_min         2.219
_diffrn_source                   'micro-focus X-ray tube'
_diffrn_source_type              'INCOATEC ImuS'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6761
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. 
wR2(int) was 0.1009 before and 0.0544 after correction. 
The Ratio of minimum to maximum transmission is 0.9062.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.274
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.426
_exptl_crystal_size_mid          0.202
_exptl_crystal_size_min          0.106
_refine_diff_density_max         0.392
_refine_diff_density_min         -0.212
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         4749
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0730
_refine_ls_R_factor_gt           0.0477
_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^)+(0.0596P)^2^+0.4548P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1095
_refine_ls_wR_factor_ref         0.1192
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3624
_reflns_number_total             4749
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1sc00882j2.cif
_cod_data_source_block           0814_t
_cod_database_code               1561048
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.991
_shelx_estimated_absorpt_t_min   0.966
_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
 H1O-H1O_$1
 2.3 with sigma of 0.02
 O1-H1O
 0.84 with sigma of 0.02
3.a Ternary CH refined with riding coordinates:
 C2(H2)
3.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B)
3.c Aromatic/amide H refined with riding coordinates:
 C6(H6), C7(H7), C8(H8), C9(H9), C15(H15), C16(H16), C17(H17), C18(H18),
 C19(H19)
3.d Idealised Me refined as rotating group:
 C13(H13A,H13B,H13C)
;
_shelx_res_checksum              21058
_shelx_hkl_checksum              48273
_olex2_submission_special_instructions 'No special instructions were received'