Synthesis of Bis(oxazoline) Ligands Possessing C-5 gem-Disubstitution and Their Application in Asymmetric Friedel-Crafts Alkylations.
O'Reilly, Steven; Aylward, Miriam; Keogh-Hansen, Caoimhe; Fitzpatrick, Brian; McManus, Helen A.; Müller-Bunz, Helge; Guiry, Patrick J.; The Journal of organic chemistry 80 (2015) 10177–10186; doi:10.1021/acs.joc.5b01767

data_4036378
_publ_section_title
;
 Synthesis of Bis(oxazoline) Ligands Possessing C-5 gem-Disubstitution and
 Their Application in Asymmetric Friedel-Crafts Alkylations.
;
_journal_issue                   20
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              10177
_journal_page_last               10186
_journal_paper_doi               10.1021/acs.joc.5b01767
_journal_volume                  80
_journal_year                    2015
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C27 H35 N3 O2'
_chemical_formula_sum            'C27 H35 N3 O2'
_chemical_formula_weight         433.58
_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_Hall  'P 2ac 2ab'
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.54492(6)
_cell_length_b                   12.68954(7)
_cell_length_c                   19.9983(1)
_cell_measurement_reflns_used    16939
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      76.6790
_cell_measurement_theta_min      4.1260
_cell_volume                     2422.21(2)
_computing_cell_refinement
; 
CrysAlisPro, Agilent Technologies, 
Version 1.171.36.24a (release 19-12-2012 CrysAlis171 .NET) 
(compiled Dec 19 2012,11:08:27) 
;
_computing_data_collection
; 
CrysAlisPro, Agilent Technologies, 
Version 1.171.36.24a (release 19-12-2012 CrysAlis171 .NET) 
(compiled Dec 19 2012,11:08:27) 
;
_computing_data_reduction
; 
CrysAlisPro, Agilent Technologies, 
Version 1.171.36.24a (release 19-12-2012 CrysAlis171 .NET) 
(compiled Dec 19 2012,11:08:27) 
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 10.3196
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'SuperNova (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0328
_diffrn_reflns_av_sigmaI/netI    0.0209
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            25062
_diffrn_reflns_theta_full        76.84
_diffrn_reflns_theta_max         76.84
_diffrn_reflns_theta_min         4.13
_exptl_absorpt_coefficient_mu    0.591
_exptl_absorpt_correction_T_max  0.947
_exptl_absorpt_correction_T_min  0.900
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
; 
CrysAlisPro, Agilent Technologies, 
Version 1.171.36.24a (release 19-12-2012 CrysAlis171 .NET) 
(compiled Dec 19 2012,11:08:27) 
Analytical numeric absorption correction using a multifaceted crystal 
model based on expressions derived by R.C. Clark & J.S. Reid. 
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897) 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.189
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             936
_exptl_crystal_size_max          0.3189
_exptl_crystal_size_mid          0.2074
_exptl_crystal_size_min          0.1535
_refine_diff_density_max         0.221
_refine_diff_density_min         -0.146
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.09(14)
_refine_ls_extinction_coef       0.00248(17)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     297
_refine_ls_number_reflns         5041
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0277
_refine_ls_R_factor_gt           0.0266
_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^)+(0.0374P)^2^+0.3185P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0678
_refine_ls_wR_factor_ref         0.0686
_reflns_number_gt                4898
_reflns_number_total             5041
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo5b01767_si_001.cif
_cod_data_source_block           gui78(11b)
_cod_database_code               4036378