Short Stereoselective Synthesis of α-Substitute γ-Lactams
Bhooma Raghavan; Rodney L. Johnson; Journal of Organic Chemistry 71 (2006) 2151–2154; doi:10.1021/jo052212q

data_4021536
_publ_section_title
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 Short Stereoselective Synthesis of \a-Substitute \g-Lactams
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2151
_journal_page_last               2154
_journal_paper_doi               10.1021/jo052212q
_journal_volume                  71
_journal_year                    2006
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C28 H28 N2 O4'
_chemical_formula_sum            'C28 H28 N2 O4'
_chemical_formula_weight         456.52
_chemical_name_common            04022a
_chemical_name_systematic
;
3-[3R-Benzyl-1-(4-methoxybenzyl)-2-oxo-pyrrolidin-3-yl]
-4S-phenyl-oxazolidin-2-one (7a)
;
_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                   9.7028(13)
_cell_length_b                   10.3326(14)
_cell_length_c                   22.559(3)
_cell_measurement_reflns_used    2525
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24.96
_cell_measurement_theta_min      2.18
_cell_volume                     2261.7(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0445
_diffrn_reflns_av_sigmaI/netI    0.0302
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            17653
_diffrn_reflns_theta_full        25.08
_diffrn_reflns_theta_max         25.08
_diffrn_reflns_theta_min         1.81
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9955
_exptl_absorpt_correction_T_min  0.9606
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2002)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.341
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.134
_refine_diff_density_min         -0.156
_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   -0.9(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     308
_refine_ls_number_reflns         2306
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0366
_refine_ls_R_factor_gt           0.0282
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0408P)^2^+0.4282P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0719
_refine_ls_wR_factor_ref         0.0785
_reflns_number_gt                2049
_reflns_number_total             2306
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo052212qsi20060103_053414_1.cif
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan' changed
to 'multi-scan' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
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_cod_database_code               4021536