Study of the Reaction of Bulky Aryllithium Reagents with 3,4-Dimethyl-2,5-diphenyl-1,3,2-oxazaphospholidine-2-borane Derived from Ephedrine
Michel (Massoud S.) Stephan; Damjan Šterk; Barbara Modec; Barbara Mohar; Journal of Organic Chemistry 72 (2007) 8010–8018; doi:10.1021/jo7014505

data_4023010
_publ_section_title
;
 Study of the Reaction of Bulky Aryllithium Reagents with
 3,4-Dimethyl-2,5-diphenyl-1,3,2-oxazaphospholidine-2-borane
 Derived from Ephedrine
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              8010
_journal_page_last               8018
_journal_paper_doi               10.1021/jo7014505
_journal_volume                  72
_journal_year                    2007
_chemical_absolute_configuration rmad
_chemical_formula_sum            'C44 H56 B2 Fe N2 O2 P2'
_chemical_formula_weight         784.32
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           19
_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                   9.28400(10)
_cell_length_b                   19.3628(2)
_cell_length_c                   24.2448(3)
_cell_measurement_temperature    293(2)
_cell_volume                     4358.35(8)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Nonius Kappa CCD diffractometer'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.052
_diffrn_reflns_av_sigmaI/netI    0.0398
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            39917
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.76
_exptl_absorpt_coefficient_mu    0.456
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
HKL SCALEPACK (Otwinowski & Minor, 1997)
;
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.195
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1664
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.308
_refine_diff_density_min         -0.344
_refine_diff_density_rms         0.116
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.007(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     478
_refine_ls_number_reflns         9953
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0586
_refine_ls_R_factor_gt           0.0415
_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^)+(0.0498P)^2^+0.7669P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0925
_refine_ls_wR_factor_ref         0.1010
_reflns_number_gt                8253
_reflns_number_total             9953
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo7014505-File002.cif
_cod_data_source_block           2fa
_cod_database_code               4023010