Asymmetric syntheses of enantiopure C(5)-substituted transpentacins via diastereoselective Ireland-Claisen rearrangements
Stephen G. Davies; Ai M. Fletcher; Paul M. Roberts; James E. Thomson; Charlotte M. Zammit; Chem.Commun. 49 (2013) 7037–; doi:10.1039/c3cc43250e

data_7109564
_publ_section_title
;
 Asymmetric syntheses of enantiopure C(5)-substituted transpentacins via
 diastereoselective Ireland-Claisen rearrangements
;
_journal_name_full               Chem.Commun.
_journal_page_first              7037
_journal_paper_doi               10.1039/c3cc43250e
_journal_volume                  49
_journal_year                    2013
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C31 H36 B1 F4 N1 O2'
_chemical_formula_sum            'C31 H36 B F4 N O2'
_chemical_formula_weight         541.43
_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   difmap
_atom_sites_solution_primary     direct
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.33249(10)
_cell_length_b                   15.31121(15)
_cell_length_c                   20.0967(2)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    150
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     2871.65(5)
_computing_cell_refinement       'USER DEFINED CELL REFINEMENT'
_computing_data_collection       'USER DEFINED DATA COLLECTION'
_computing_data_reduction        'USER DEFINED DATA REDUCTION'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       Serial
_diffrn_measurement_device_type  Unknown
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.030
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            30050
_diffrn_reflns_theta_full        76.671
_diffrn_reflns_theta_max         76.671
_diffrn_reflns_theta_min         3.629
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.784
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.260
_exptl_crystal_size_min          0.230
_refine_diff_density_max         0.23
_refine_diff_density_min         -0.25
_refine_ls_abs_structure_details 'Flack (1983), 2609 Friedel-pairs'
_refine_ls_abs_structure_Flack   -0.03(14)
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0101
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         5068
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0391
_refine_ls_R_factor_gt           0.0382
_refine_ls_shift/su_max          0.0002611
_refine_ls_shift/su_mean         0.0000284
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.06P)^2^ + 0.64P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1035
_refine_ls_wR_factor_gt          0.1027
_refine_ls_wR_factor_ref         0.1017
_reflns_limit_h_max              11
_reflns_limit_h_min              -11
_reflns_limit_k_max              19
_reflns_limit_k_min              0
_reflns_limit_l_max              25
_reflns_limit_l_min              0
_reflns_number_gt                5140
_reflns_number_total             6010
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.94
_oxford_diffrn_Wilson_scale      0.05
_oxford_refine_ls_r_factor_ref   0.0377
_oxford_refine_ls_scale          5.13(9)
_oxford_reflns_number_all        5261
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_cod_data_source_file            c3cc43250e.txt
_cod_data_source_block           19.HBF4
_cod_original_formula_sum        'C31 H36 B1 F4 N1 O2'
_cod_database_code               7109564
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
CONT ENANTIO 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  10,X'S) H   ( 101,X'S) 
RIDE N   (  11,X'S) H   ( 111,X'S) 
RIDE C   (  12,X'S) H   ( 122,X'S) H   ( 121,X'S) 
RIDE C   (  14,X'S) H   ( 141,X'S) 
RIDE C   (  15,X'S) H   ( 151,X'S) 
RIDE C   (  16,X'S) H   ( 161,X'S) 
RIDE C   (  17,X'S) H   ( 171,X'S) 
RIDE C   (  18,X'S) H   ( 181,X'S) 
RIDE C   (  19,X'S) H   ( 191,X'S) 
RIDE C   (  20,X'S) H   ( 201,X'S) H   ( 202,X'S) H   ( 203,X'S) 
RIDE C   (  22,X'S) H   ( 221,X'S) 
RIDE C   (  23,X'S) H   ( 231,X'S) 
RIDE C   (  24,X'S) H   ( 241,X'S) 
RIDE C   (  25,X'S) H   ( 251,X'S) 
RIDE C   (  26,X'S) H   ( 261,X'S) 
RIDE C   (  27,X'S) H   ( 271,X'S) 
RIDE C   (  28,X'S) H   ( 281,X'S) 
RIDE C   (  29,X'S) H   ( 292,X'S) H   ( 293,X'S) H   ( 291,X'S) 
RIDE C   (  30,X'S) H   ( 301,X'S) 
RIDE C   (  32,X'S) H   ( 321,X'S) 
RIDE C   (  33,X'S) H   ( 331,X'S) 
RIDE C   (  34,X'S) H   ( 341,X'S) 
RIDE C   (  35,X'S) H   ( 351,X'S) 
RIDE C   (  36,X'S) H   ( 361,X'S) 
RIDE C   (  37,X'S) H   ( 371,X'S) 
RIDE C   (  38,X'S) H   ( 381,X'S) H   ( 382,X'S) 
RIDE C   (  39,X'S) H   ( 392,X'S) H   ( 393,X'S) H   ( 391,X'S) 
END                                                                             
;
_iucr_refine_instruction_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
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