A mutually pi-facial selective cyclopropanation of chiral enamides using dirhodium(II) carbenoids.
Lu, Ting; Song, Zhenlei; Hsung, Richard P.; Organic letters 10 (2008) 541–544; doi:10.1021/ol702824s

data_1504513
_publ_section_title
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 A mutually pi-facial selective cyclopropanation of chiral enamides using
 dirhodium(II) carbenoids.
;
_journal_issue                   4
_journal_name_full               'Organic letters'
_journal_page_first              541
_journal_page_last               544
_journal_paper_doi               10.1021/ol702824s
_journal_volume                  10
_journal_year                    2008
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C22 H31 N O4'
_chemical_formula_sum            'C22 H31 N O4'
_chemical_formula_weight         373.48
_chemical_name_common            07226a
_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                   6.0884(5)
_cell_length_b                   16.1018(13)
_cell_length_c                   21.8321(18)
_cell_measurement_reflns_used    2882
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.93
_cell_measurement_theta_min      2.25
_cell_volume                     2140.3(3)
_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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0312
_diffrn_reflns_av_sigmaI/netI    0.0152
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            23727
_diffrn_reflns_theta_full        26.38
_diffrn_reflns_theta_max         26.38
_diffrn_reflns_theta_min         1.57
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.9844
_exptl_absorpt_correction_T_min  0.9616
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2004)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.159
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             808
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.254
_refine_diff_density_min         -0.178
_refine_diff_density_rms         0.029
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.2(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         2536
_refine_ls_number_restraints     14
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0422
_refine_ls_R_factor_gt           0.0362
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0547P)^2^+0.4304P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0979
_refine_ls_wR_factor_ref         0.1023
_reflns_number_gt                2222
_reflns_number_total             2536
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol702824s-file006.cif
_cod_data_source_block           07266a
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1504513