Dearomative Michael addition involving enals and 2-nitrobenzofurans realized under NHC-catalysis
Dyguda, Mateusz; Skrzynska, Anna; Sieroń, Lesław; Albrecht, Łukasz; Chemical Communications  (2022) –; doi:10.1039/D2CC00294A

data_7129890
_publ_section_title
;
 Dearomative Michael addition involving enals and 2-nitrobenzofurans
 realized under NHC-catalysis
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/D2CC00294A
_journal_year                    2022
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C22 H19 N O5'
_chemical_formula_sum            'C22 H19 N O5'
_chemical_formula_weight         377.38
_chemical_name_systematic
;
(R)-methyl 3-(naphthalen-2-yl)-3-((2S,3S)-2-nitro-2,3-dihydrobenzofuran-3-yl) propanoate
;
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     difmap
_atom_sites_solution_secondary   difmap
_audit_update_record
;
2021-08-25 deposited with the CCDC.	2022-03-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.6297(1)
_cell_length_b                   10.2148(1)
_cell_length_c                   20.5342(3)
_cell_measurement_reflns_used    42191
_cell_measurement_temperature    100
_cell_measurement_theta_max      79.039
_cell_measurement_theta_min      4.261
_cell_volume                     1810.10(4)
_computing_cell_refinement       'CrysAlisPro 1.171.41.111a (Rigaku OD, 2021)'
_computing_data_collection       'CrysAlisPro 1.171.41.111a (Rigaku OD, 2021)'
_computing_data_reduction        'CrysAlisPro 1.171.41.111a (Rigaku OD, 2021)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      100
_diffrn_detector                 'Hybrid Pixel Array Detector'
_diffrn_detector_area_resol_mean 5.8140
_diffrn_detector_type            'Pilatus 300K'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB Synergy, Dualflex, Pilatus 300K'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0392
_diffrn_reflns_av_unetI/netI     0.0108
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            49500
_diffrn_reflns_theta_full        66.54
_diffrn_reflns_theta_max         66.54
_diffrn_reflns_theta_min         4.31
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'PhotonJet (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.814
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.320
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.41.111a (Rigaku Oxford Diffraction, 2021)
Numerical absorption correction based on gaussian integration over
a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
- Detector area scaling
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.385
_exptl_crystal_description       plate
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.57
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.205
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details
;
 Flack x determined using 1321 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.06(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         3197
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0294
_refine_ls_R_factor_gt           0.0291
_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^)+(0.0368P)^2^+0.7139P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0751
_refine_ls_wR_factor_ref         0.0754
_reflns_number_gt                3164
_reflns_number_total             3197
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            d2cc00294a2.cif
_cod_data_source_block           mdas
_cod_database_code               7129890
_cell_oxdiff_measurement_reflns_used 42191
_shelx_res_checksum              24535