Cu(OTf)<sub>2</sub> catalyzed Ugi-type reaction of <i>N</i>,<i>O</i>-acetals with isocyanides for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides.
Mao, Zhuo-Ya; Nie, Xiao-Di; Feng, Yi-Man; Si, Chang-Mei; Wei, Bang-Guo; Lin, Guo-Qiang; Chemical communications (Cambridge, England) 57 (2021) 9248–9251; doi:10.1039/d1cc03113a

data_7128859
_publ_section_title
;
 Cu(OTf)<sub>2</sub> catalyzed Ugi-type reaction of
 <i>N</i>,<i>O</i>-acetals with isocyanides for the synthesis of
 pyrrolidinyl and piperidinyl 2-carboxamides.
;
_journal_issue                   73
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              9248
_journal_page_last               9251
_journal_paper_doi               10.1039/d1cc03113a
_journal_volume                  57
_journal_year                    2021
_chemical_absolute_configuration unk
_chemical_formula_sum            'C16 H28 N2 O4'
_chemical_formula_weight         312.40
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2021-06-10 deposited with the CCDC.	2021-08-20 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.6865(7)
_cell_length_b                   10.3400(8)
_cell_length_c                   17.7546(11)
_cell_measurement_reflns_used    3986
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      49.132
_cell_measurement_theta_min      4.859
_cell_volume                     1778.3(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.994
_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           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0266
_diffrn_reflns_av_unetI/netI     0.0352
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            8722
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.989
_diffrn_reflns_theta_min         2.294
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6306
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.167
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.190
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.130
_refine_diff_density_max         0.087
_refine_diff_density_min         -0.097
_refine_diff_density_rms         0.023
_refine_ls_abs_structure_details
; 
 Flack x determined using 960 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons and Flack (2004), Acta Cryst. A60, s61). 
;
_refine_ls_abs_structure_Flack   0.0(6)
_refine_ls_extinction_coef       0.043(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     204
_refine_ls_number_reflns         3456
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0546
_refine_ls_R_factor_gt           0.0389
_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^)+(0.0395P)^2^+0.1273P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0833
_refine_ls_wR_factor_ref         0.0935
_reflns_Friedel_coverage         0.739
_reflns_Friedel_fraction_full    0.992
_reflns_Friedel_fraction_max     0.992
_reflns_number_gt                2750
_reflns_number_total             3456
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc03113a2.cif
_cod_data_source_block           mo_ddz20132_0m
_cod_depositor_comments
'Adding full bibliography for 7128859--7128864.cif.'
_cod_database_code               7128859
_shelx_estimated_absorpt_t_min   0.984
_shelx_estimated_absorpt_t_max   0.989
_shelxl_version_number           2013-4
_shelx_res_checksum              47947