Asymmetric Synthesis of 2-Substituted Oxetan-3-ones via Metalated SAMP/RAMP Hydrazones
Joanna V. Geden; Benjamin O. Beasley; Guy J. Clarkson; Michael Shipman; Journal of Organic Chemistry 78 (2013) 12243–12250; doi:10.1021/jo4020485

data_4028821
_publ_section_title
;
 Asymmetric Synthesis of 2-Substituted Oxetan-3-ones via Metalated
 SAMP/RAMP Hydrazones
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              12243
_journal_page_last               12250
_journal_paper_doi               10.1021/jo4020485
_journal_volume                  78
_journal_year                    2013
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C23 H24 N2 O3'
_chemical_formula_sum            'C23 H24 N2 O3'
_chemical_formula_weight         376.44
_space_group_IT_number           96
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4nw 2abw'
_symmetry_space_group_name_H-M   'P 43 21 2'
_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            16
_cell_length_a                   11.52756(12)
_cell_length_b                   11.52756(12)
_cell_length_c                   58.0386(7)
_cell_measurement_reflns_used    15446
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      78.03
_cell_measurement_theta_min      3.04
_cell_volume                     7712.44(15)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 10.2833
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Oxford Diffraction Gemini R'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) x-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0370
_diffrn_reflns_av_sigmaI/netI    0.0321
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       71
_diffrn_reflns_limit_l_min       -71
_diffrn_reflns_number            28905
_diffrn_reflns_theta_full        71.97
_diffrn_reflns_theta_max         71.97
_diffrn_reflns_theta_min         3.91
_diffrn_standards_decay_%        nil
_exptl_absorpt_coefficient_mu    0.693
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.54
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'ABSPACK(CrysAlis, Oxford Diffraction)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.297
_exptl_crystal_description       block
_exptl_crystal_F_000             3200
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.303
_refine_diff_density_min         -0.301
_refine_diff_density_rms         0.065
_refine_ls_abs_structure_details
'Flack H D (1983), Acta Cryst. A39, 876-881, 3257 Friedel pairs'
_refine_ls_abs_structure_Flack   0.1(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.138
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     562
_refine_ls_number_reflns         7539
_refine_ls_number_restraints     36
_refine_ls_restrained_S_all      1.135
_refine_ls_R_factor_all          0.0708
_refine_ls_R_factor_gt           0.0695
_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^)+(0.0000P)^2^+19.9800P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1554
_refine_ls_wR_factor_ref         0.1559
_reflns_number_gt                7392
_reflns_number_total             7539
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo4020485_si_003.cif
_cod_data_source_block           bb5
_cod_original_cell_volume        7712.43(14)
_cod_database_code               4028821