Nucleophilic Aromatic Substitution (SNAr) as an Approach to Challenging Carbohydrate-Aryl Ethers.
Henderson, Alexander S.; Medina, Sandra; Bower, John F.; Galan, M. Carmen; Organic letters 17 (2015) 4846–4849; doi:10.1021/acs.orglett.5b02413

data_1555314
_publ_section_title
;
 Nucleophilic Aromatic Substitution (SNAr) as an Approach to Challenging
 Carbohydrate-Aryl Ethers.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              4846
_journal_page_last               4849
_journal_paper_doi               10.1021/acs.orglett.5b02413
_journal_volume                  17
_journal_year                    2015
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C20 H18 F3 N3 O5'
_chemical_formula_sum            'C20 H18 F3 N3 O5'
_chemical_formula_weight         437.37
_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
_atom_sites_solution_primary     iterative
_audit_creation_date             2014-05-15
_audit_creation_method
;
Olex2 1.2
(compiled 2014.03.20 svn.r2914 for OlexSys, GUI svn.r4816)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.1216(7)
_cell_length_b                   11.5944(10)
_cell_length_c                   21.1982(18)
_cell_measurement_reflns_used    3280
_cell_measurement_temperature    100.00
_cell_measurement_theta_max      25.84
_cell_measurement_theta_min      2.60
_cell_volume                     1996.1(3)
_computing_data_reduction        'SAINT v8.27A (Bruker, 2012)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution
;
Superflip (Palatinus & Chapuis, 2007;Palatinus & van der Lee, 2008;
Palatinus et al., 2012)
;
_diffrn_ambient_temperature      100.00
_diffrn_detector                 'Bruker area detector'
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'Bruker Apex II kappa CCDC area detector'
_diffrn_measurement_device_type  'Bruker Apex II kappa CCDC area detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0472
_diffrn_reflns_av_unetI/netI     0.0453
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            15957
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         26.742
_diffrn_reflns_theta_min         1.921
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.124
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8745
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.0655 before and 0.0519 after correction.
The Ratio of minimum to maximum transmission is 0.8745.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.455
_exptl_crystal_description       block
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.167
_refine_diff_density_min         -0.183
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details
;
 Flack x determined using 1256 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.3(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         4227
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0555
_refine_ls_R_factor_gt           0.0368
_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^)+(0.0346P)^2^+0.0370P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0712
_refine_ls_wR_factor_ref         0.0791
_reflns_Friedel_coverage         0.741
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.992
_reflns_number_gt                3391
_reflns_number_total             4227
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol5b02413_si_002.cif
_cod_data_source_block           testo1
_cod_database_code               1555314
_shelxl_version_number           2013-3
_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 C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C6(H6), C8(H8)
2.b Secondary CH2 refined with riding coordinates:
 C7(H7A,H7B)
2.c Aromatic/amide H refined with riding coordinates:
 C10(H10), C11(H11), C12(H12), C13(H13), C14(H14), C16(H16), C18(H18)
2.d Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C)
;
_shelx_res_checksum              38334
_shelx_hkl_checksum              3853