New entry to convertible isocyanides for the Ugi reaction and its application to the stereocontrolled formal total synthesis of the proteasome inhibitor omuralide.
Gilley, Cynthia B.; Buller, Matthew J.; Kobayashi, Yoshihisa; Organic letters 9 (2007) 3631–3634; doi:10.1021/ol701446y

data_1505507
_publ_section_title
;
 New entry to convertible isocyanides for the Ugi reaction and its
 application to the stereocontrolled formal total synthesis of the
 proteasome inhibitor omuralide.
;
_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              3631
_journal_page_last               3634
_journal_paper_doi               10.1021/ol701446y
_journal_volume                  9
_journal_year                    2007
_chemical_absolute_configuration ad
_chemical_formula_sum            'C28 H36 N2 O7'
_chemical_formula_weight         512.59
_chemical_name_common            CG-712
_space_group.centring_type       P
_space_group_IT_number           19
_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                   8.5250(9)
_cell_length_b                   12.0770(14)
_cell_length_c                   25.174(3)
_cell_measurement_reflns_used    7221
_cell_measurement_temperature    208(2)
_cell_measurement_theta_max      28.09
_cell_measurement_theta_min      2.34
_cell_volume                     2591.8(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    ORTEP-32
_computing_publication_material  WinGX
_computing_structure_refinement  SHELXL-97
_computing_structure_solution    SIR-2004
_diffrn_ambient_temperature      208(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         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0390
_diffrn_reflns_av_sigmaI/netI    0.0420
_diffrn_refln_scan_rate          40
_diffrn_refln_scan_width         0.3
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            15122
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.34
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9906
_exptl_absorpt_correction_T_min  0.9677
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.314
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1096
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.146
_refine_diff_density_min         -0.161
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.3(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.090
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     340
_refine_ls_number_reflns         4580
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.090
_refine_ls_R_factor_all          0.0506
_refine_ls_R_factor_gt           0.0427
_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^)+(0.0420P)^2^+0.2814P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0899
_refine_ls_wR_factor_ref         0.0928
_reflns_number_gt                4052
_reflns_number_total             4580
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol701446y-file002.cif
_cod_data_source_block           kob02
_cod_depositor_comments
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The following automatic conversions were performed:

'_space_group.centring_type' value 'primitive' was replaced with the
value 'P' as specified in the replacement file
'/home/antanas/src/cod-tools/trunk/data/replacement-values/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 5642 2017-10-24 12:04:52Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1505507