Chromium-catalyzed reductive alkylation of N heteroarenes using alkyl formates as transfer hydroalkylation reagents
Pal, Anit; Borah, Asish; Das, Animesh; Chemical Communications  (2025) –; doi:10.1039/D5CC06076A

data_7135281
_publ_section_title
;
 Chromium-catalyzed reductive alkylation of N heteroarenes using alkyl
 formates as transfer hydroalkylation reagents
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/D5CC06076A
_journal_year                    2025
_chemical_formula_moiety         'C16 H17 N O'
_chemical_formula_sum            'C16 H17 N O'
_chemical_formula_weight         239.30
_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   mixed
_atom_sites_solution_primary     iterative
_audit_creation_date             2024-06-14
_audit_creation_method
;
Olex2 1.5-alpha
(compiled 2023.11.24 svn.r209d9fb2 for OlexSys, GUI svn.r6869)
;
_audit_update_record
;
2024-10-30 deposited with the CCDC.	2025-12-01 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.5367(3)
_cell_length_b                   7.7309(4)
_cell_length_c                   29.9149(15)
_cell_measurement_reflns_used    9081
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      25.27
_cell_measurement_theta_min      2.72
_cell_volume                     1280.47(12)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.5-alpha (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5-alpha (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'olex2.solve 1.5-alpha (Bourhis et al., 2015)'
_diffrn_ambient_temperature      295.00
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.997
_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  0.0608
_diffrn_reflns_av_unetI/netI     0.0419
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            28487
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.334
_diffrn_reflns_theta_min         2.721
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6813
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1230 before and 0.0615 after correction.
The Ratio of minimum to maximum transmission is 0.9143.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'light yellow'
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.241
_exptl_crystal_description       plate
_exptl_crystal_F_000             512
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.29
_exptl_crystal_size_min          0.17
_exptl_transmission_factor_max   0.7452
_exptl_transmission_factor_min   0.6813
_refine_diff_density_max         0.682
_refine_diff_density_min         -0.310
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details
;
 Flack x determined using 590 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.4(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.143
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     166
_refine_ls_number_reflns         2347
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.143
_refine_ls_R_factor_all          0.1046
_refine_ls_R_factor_gt           0.0834
_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^+1.5615P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1708
_refine_ls_wR_factor_ref         0.1829
_reflns_Friedel_coverage         0.662
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.996
_reflns_number_gt                1931
_reflns_number_total             2347
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5cc06076a2.cif
_cod_data_source_block           ad_ap_214_0m_a
_cod_database_code               7135281
_shelx_shelxl_version_number     2018/3
_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 O(H) groups
2.a Secondary CH2 refined with riding coordinates:
 C7(H7A,H7B), C8(H8A,H8B), C9(H9A,H9B), C10(H10A,H10B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2A), C3(H3), C4(H4), C5(H5), C6(H6), C13(H13), C14(H14), C16(H16)
;
_shelx_res_checksum              31793
_olex2_submission_special_instructions 'No special instructions were received'