Ring-Opening Hydrofluorination of 2,3- and 3,4-Epoxy Amines by HBF4.OEt2: Application to the Asymmetric Synthesis of (S,S)-3-Deoxy-3-fluorosafingol
Alexander J. Cresswell; Stephen G. Davies; James A. Lee; Melloney J. Morris; Paul M. Roberts; James E. Thomson; Journal of Organic Chemistry 76 (2011) 4617–4627; doi:10.1021/jo200517w

data_4026369
_publ_contact_author_address
;Department of Chemistry
Chemistry Research Laboratory
University of Oxford
Mansfield Road
Oxford
OX1 3TA
U.K.
;
_publ_contact_author_email       steve.davies@chem.ox.ac.uk
_publ_contact_author_fax         '+44 1865 275633'
_publ_contact_author_name        'Stephen G. Davies'
_publ_contact_author_phone       '+44 1865 275695'
_publ_section_title
;
 Ring-Opening Hydrofluorination of 2,3- and 3,4-Epoxy Amines by HBF4.OEt2:
 Application to the Asymmetric Synthesis of (S,S)-3-Deoxy-3-fluorosafingol
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              4617
_journal_page_last               4627
_journal_paper_doi               10.1021/jo200517w
_journal_volume                  76
_journal_year                    2011
_chemical_formula_moiety         'C20 H24 F1 N1 O1'
_chemical_formula_sum            'C20 H24 F N O'
_chemical_formula_weight         313.41
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             10-07-02
_audit_creation_method           CRYSTALS_ver_12.85
_cell_angle_alpha                90
_cell_angle_beta                 95.0616(6)
_cell_angle_gamma                90
_cell_formula_units_Z            8
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_cell_length_b                   14.8776(2)
_cell_length_c                   35.9265(6)
_cell_measurement_reflns_used    6974
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      5
_cell_volume                     3466.72(9)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1997-2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device       'Nonius KappaCCD'
_diffrn_measurement_device_type  Area
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.048
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       46
_diffrn_reflns_limit_l_min       -46
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_diffrn_reflns_theta_full        25.001
_diffrn_reflns_theta_max         27.474
_diffrn_reflns_theta_min         5.175
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.98
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.201
_exptl_crystal_description       plate
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_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.19
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_refine_diff_density_min         -0.35
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         5599
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0841
_refine_ls_R_factor_gt           0.0457
_refine_ls_shift/su_max          0.000356
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.04P)^2^ + 1.07P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1060
_refine_ls_wR_factor_gt          0.0927
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_reflns_limit_h_max              8
_reflns_limit_h_min              -8
_reflns_limit_k_max              19
_reflns_limit_k_min              0
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_reflns_limit_l_min              0
_reflns_number_gt                3735
_reflns_number_total             7783
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   3.05
_oxford_diffrn_Wilson_scale      6.97
_oxford_refine_ls_r_factor_ref   0.0841
_oxford_refine_ls_scale          0.4152(5)
_oxford_reflns_number_all        5599
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_cod_data_source_file            jo200517w_si_002.cif
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      'P 1 21/n 1 '
_cod_original_formula_sum        'C20 H24 F1 N1 O1'
_cod_database_code               4026369