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_4036382
_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 Cl2 N3 O2 Zn, C H2 Cl2'
_chemical_formula_sum            'C28 H37 Cl4 N3 O2 Zn'
_chemical_formula_weight         654.78
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 94.336(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.9185(8)
_cell_length_b                   10.6832(9)
_cell_length_c                   14.5573(12)
_cell_measurement_temperature    293(2)
_cell_volume                     1538.1(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.937
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       '\p and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0171
_diffrn_reflns_av_sigmaI/netI    0.0296
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            13999
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         29.35
_diffrn_reflns_theta_min         2.37
_exptl_absorpt_coefficient_mu    1.176
_exptl_absorpt_correction_T_max  0.5910
_exptl_absorpt_correction_T_min  0.4531
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 SADABS v.2.10 (Bruker,2003) was used for absorption correction. 
 R(int) for selected reflections was 0.044 before and 0.017 after 
 correction. The ratio of minimum to maximum transmission is 0.766667.
 An additional spherical absorption correction with \m*r=0.4 was applied. 
 The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.414
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.80
_exptl_crystal_size_mid          0.60
_exptl_crystal_size_min          0.50
_refine_diff_density_max         0.751
_refine_diff_density_min         -0.281
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.001(8)
_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     360
_refine_ls_number_reflns         7493
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0390
_refine_ls_R_factor_gt           0.0366
_refine_ls_shift/su_max          0.013
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0579P)^2^+0.2595P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0945
_refine_ls_wR_factor_ref         0.0962
_reflns_number_gt                7058
_reflns_number_total             7493
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo5b01767_si_001.cif
_cod_data_source_block           gui001_18
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4036382