Construction of Multiple, Contiguous Quaternary Stereocenters in Acyclic Molecules by Lithiation-Borylation.
Watson, Charlotte G.; Balanta, Angelica; Elford, Tim G.; Essafi, Stéphanie; Harvey, Jeremy N.; Aggarwal, Varinder K.; Journal of the American Chemical Society  (2014) 141203101453003–; doi:10.1021/ja509029h

data_4123026
_publ_section_title
;
 Construction of Multiple, Contiguous Quaternary Stereocenters in Acyclic
 Molecules by Lithiation-Borylation.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              141203101453003
_journal_paper_doi               10.1021/ja509029h
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C21 H24 F3 N O2'
_chemical_formula_sum            'C21 H24 F3 N O2'
_chemical_formula_weight         379.41
_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'
_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     direct
_audit_creation_date             2014-05-22
_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                   9.4867(15)
_cell_length_b                   9.7387(15)
_cell_length_c                   20.945(3)
_cell_measurement_reflns_used    9880
_cell_measurement_temperature    100.00
_cell_measurement_theta_max      66.68
_cell_measurement_theta_min      4.54
_cell_volume                     1935.1(5)
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_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    'XS (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.00
_diffrn_detector                 'Bruker Proteum CCD'
_diffrn_detector_type            'Bruker Proteum CCD'
_diffrn_measured_fraction_theta_full 0.974
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       'Bruker Mircostar Rotating anode'
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0490
_diffrn_reflns_av_unetI/netI     0.0306
_diffrn_reflns_Laue_measured_fraction_full 0.974
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            24799
_diffrn_reflns_point_group_measured_fraction_full 0.970
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         66.680
_diffrn_reflns_theta_min         4.221
_diffrn_source                   'micro-focus rotating anode'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.864
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.2693
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.1585 before and 0.0798 after correction.
The Ratio of minimum to maximum transmission is 0.2693.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_description       block
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.066
_refine_ls_abs_structure_details
;
 Flack x determined using 1420 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.04(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.153
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         3405
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.153
_refine_ls_R_factor_all          0.0339
_refine_ls_R_factor_gt           0.0337
_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^)+(0.0580P)^2^+0.3451P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0968
_refine_ls_wR_factor_ref         0.0970
_reflns_Friedel_coverage         0.727
_reflns_Friedel_fraction_full    0.965
_reflns_Friedel_fraction_max     0.988
_reflns_number_gt                3377
_reflns_number_total             3405
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja509029h_si_004.cif
_cod_data_source_block           testo1
_cod_database_code               4123026
_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, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C12(H12A,H12B)
2.b Aromatic/amide H refined with riding coordinates:
 N1(H1), C2(H2), C3(H3), C4(H4), C5(H5), C6(H6), C16(H16), C17(H17), C19(H19),
 C20(H20)
2.c Idealised Me refined as rotating group:
 C10(H10A,H10B,H10C), C13(H13A,H13B,H13C), C14(H14A,H14B,H14C), C21(H21A,H21B,
 H21C)
;
_shelx_res_checksum              43985
_shelx_hkl_checksum              85672