Enamine-mediated Mannich reaction of cyclic N,O-acetals and amido acetals: the multigram synthesis of pyrrolidine alkaloid precursors
Turmanov, Rakhymzhan A.; Smolobochkin, Andrey V.; Gazizov, Almir S.; Rizbayeva, Tanzilya S.; Zapylkin, Danil D.; Voronina, Julia K.; Voloshina, Alexandra D.; Syakaev, Victor V.; Kurenkov, Alexey V.; Burilov, Alexander R.; Pudovik, Michail A.; Organic & Biomolecular Chemistry  (2022) –; doi:10.1039/D2OB01276F

data_7158854
_publ_section_title
;
 Enamine-mediated Mannich reaction of cyclic N,O-acetals and amido
 acetals: the multigram synthesis of pyrrolidine alkaloid precursors
;
_journal_name_full               'Organic &amp; Biomolecular Chemistry'
_journal_paper_doi               10.1039/D2OB01276F
_journal_year                    2022
_chemical_formula_moiety         'C20 H23 N O4 S'
_chemical_formula_sum            'C20 H23 N O4 S'
_chemical_formula_weight         373.45
_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   geom
_audit_creation_date             2022-05-23
_audit_creation_method
;
Olex2 1.3
(compiled 2020.11.12 svn.r5f609507 for OlexSys, GUI svn.r6408)
;
_audit_update_record
;
2022-05-26 deposited with the CCDC.	2022-08-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.051(11)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   21.211(9)
_cell_length_b                   9.495(4)
_cell_length_c                   9.430(4)
_cell_measurement_reflns_used    4566
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      30.36
_cell_measurement_theta_min      2.36
_cell_volume                     1870.0(14)
_computing_cell_refinement       'SAINT V8.40A (Bruker, 2019)'
_computing_data_reduction        'SAINT V8.40A (Bruker, 2019)'
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.0
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0420
_diffrn_reflns_av_unetI/netI     0.0513
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            13697
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.000
_diffrn_reflns_theta_min         1.950
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.198
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6125
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1186 before and 0.0481 after correction.
The Ratio of minimum to maximum transmission is 0.8209.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.326
_exptl_crystal_description       prizm
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.369
_refine_diff_density_min         -0.364
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     237
_refine_ls_number_reflns         4520
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0745
_refine_ls_R_factor_gt           0.0492
_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^)+(0.0371P)^2^+1.2236P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1003
_refine_ls_wR_factor_ref         0.1114
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3366
_reflns_number_total             4520
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2ob01276f2.cif
_cod_data_source_block           a_a_CCDC2
_cod_original_cell_volume        1870.1(13)
_cod_database_code               7158854
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.996
_shelx_estimated_absorpt_t_min   0.979
_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:
 C2(H2)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C4(H4A,H4B), C5(H5A,H5B), C13(H13A,H13B)
2.c Aromatic/amide H refined with riding coordinates:
 C7(H7), C8(H8), C10(H10), C11(H11), C16(H16), C17(H17), C19(H19), C20(H20)
2.d Idealised Me refined as rotating group:
 C12(H12A,H12B,H12C), C21(H21A,H21B,H21C)
;
_shelx_res_checksum              71264
_shelx_hkl_checksum              98750
_olex2_submission_special_instructions 'No special instructions were received'