Two-step stereocontrolled synthesis of densely functionalized cyclic beta-aminoesters containing four stereocenters, based on a new cerium(IV) ammonium nitrate catalyzed sequential three-component reaction.
Sridharan, Vellaisamy; Menéndez, J Carlos; Organic letters 10 (2008) 4303–4306; doi:10.1021/ol801738d

data_1504887
_publ_section_title
;
 Two-step stereocontrolled synthesis of densely functionalized cyclic
 beta-aminoesters containing four stereocenters, based on a new cerium(IV)
 ammonium nitrate catalyzed sequential three-component reaction.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              4303
_journal_page_last               4306
_journal_paper_doi               10.1021/ol801738d
_journal_volume                  10
_journal_year                    2008
_chemical_formula_moiety         'C27 H35 N O3'
_chemical_formula_sum            'C27 H35 N O3'
_chemical_formula_weight         421.56
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                102.01(3)
_cell_angle_beta                 105.50(4)
_cell_angle_gamma                103.34(3)
_cell_formula_units_Z            2
_cell_length_a                   9.5562(4)
_cell_length_b                   9.7397(6)
_cell_length_c                   14.6070(9)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2
_cell_volume                     1220.9(5)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, (1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, (1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1996)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL-97 (Sheldrick,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 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  MACH3-Nonius
_diffrn_measurement_method       \w-2\q
_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  0.0332
_diffrn_reflns_av_sigmaI/netI    0.0233
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            5134
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         2.24
_diffrn_standards_interval_time  60
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_T_max  0.9912
_exptl_absorpt_correction_T_min  0.9861
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North et al., 1968)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.147
_exptl_crystal_density_meas      1.146
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.600
_refine_diff_density_min         -0.402
_refine_diff_density_rms         0.071
_refine_ls_extinction_coef       0.037(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     285
_refine_ls_number_reflns         4285
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.1034
_refine_ls_R_factor_gt           0.0746
_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^)+(0.1408P)^2^+0.5252P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2126
_refine_ls_wR_factor_ref         0.2422
_reflns_number_gt                2930
_reflns_number_total             4285
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol801738d_si_001.cif
_cod_data_source_block           temp
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 
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_cod_original_cell_volume        1220.8(4)
_cod_database_code               1504887