H-bond donor-directed switching of diastereoselectivity in the Michael addition of α-azido ketones to nitroolefins
Ding, Pei-Gang; Zhou, Feng; Wang, Xin; Zhao, Qiu-Hua; Yu, Jin-Sheng; Zhou, Jian; Chemical Science 11 (2020) 3852–3861; doi:10.1039/D0SC00475H

data_1557581
_publ_section_title
;
 H-bond donor-directed switching of diastereoselectivity in the Michael
 addition of \a-azido ketones to nitroolefins
;
_journal_issue                   15
_journal_name_full               'Chemical Science'
_journal_page_first              3852
_journal_page_last               3861
_journal_paper_doi               10.1039/D0SC00475H
_journal_volume                  11
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_sum            'C25 H21 Cl N2 O3'
_chemical_formula_weight         432.89
_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_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2018-10-20 deposited with the CCDC.	2020-03-11 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.2023(2)
_cell_length_b                   15.1707(4)
_cell_length_c                   23.3424(7)
_cell_measurement_reflns_used    6102
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      23.02
_cell_measurement_theta_min      2.69
_cell_volume                     2196.36(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Smart Apex II CCD'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0399
_diffrn_reflns_av_sigmaI/netI    0.0255
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            25874
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.60
_exptl_absorpt_coefficient_mu    0.203
_exptl_absorpt_correction_T_max  0.9663
_exptl_absorpt_correction_T_min  0.9323
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.309
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.226
_refine_diff_density_min         -0.287
_refine_diff_density_rms         0.031
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         3885
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0508
_refine_ls_R_factor_gt           0.0391
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0595P)^2^+0.3348P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1005
_refine_ls_wR_factor_ref         0.1092
_reflns_number_gt                3249
_reflns_number_total             3885
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d0sc00475h3.cif
_cod_data_source_block           z_CCDC1
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

 Adding full bibliography for 1557580--1557584.cif.

 Adding full bibliography for 1557580--1557584.cif.
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_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1557581