Asymmetric Syntheses of (+)-Preussin B, the C(2)-Epimer of (-)-Preussin B, and 3-Deoxy-(+)-preussin B.
Buchman, Marek; Csatayová, Kristína; Davies, Stephen G.; Fletcher, Ai M.; Houlsby, Ian T. T.; Roberts, Paul M.; Rowe, Sam M.; Thomson, James E.; The Journal of organic chemistry 81 (2016) 4907–4922; doi:10.1021/acs.joc.6b00362

data_4036730
_publ_section_title
;
 Asymmetric Syntheses of (+)-Preussin B, the C(2)-Epimer of (-)-Preussin
 B, and 3-Deoxy-(+)-preussin B.
;
_journal_issue                   12
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              4907
_journal_page_last               4922
_journal_paper_doi               10.1021/acs.joc.6b00362
_journal_volume                  81
_journal_year                    2016
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C25 H29 N1 O2'
_chemical_formula_sum            'C25 H29 N O2'
_chemical_formula_weight         375.51
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_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                   7.5811(2)
_cell_length_b                   11.5805(3)
_cell_length_c                   24.0536(9)
_cell_measurement_reflns_used    1768
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      5
_cell_volume                     2111.74(11)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_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 0.899
_diffrn_measured_fraction_theta_max 0.894
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.026
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            3891
_diffrn_reflns_theta_full        25.280
_diffrn_reflns_theta_max         27.478
_diffrn_reflns_theta_min         5.320
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_T_max  0.98
_exptl_absorpt_correction_T_min  0.98
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.181
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             808
_exptl_crystal_size_max          0.260
_exptl_crystal_size_mid          0.250
_exptl_crystal_size_min          0.230
_refine_diff_density_max         0.18
_refine_diff_density_min         -0.20
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9877
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         2470
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0577
_refine_ls_R_factor_gt           0.0430
_refine_ls_shift/su_max          0.0003318
_refine_ls_shift/su_mean         0.0000209
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.04P)^2^ + 0.42P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0999
_refine_ls_wR_factor_gt          0.0920
_refine_ls_wR_factor_ref         0.0999
_reflns_limit_h_max              9
_reflns_limit_h_min              0
_reflns_limit_k_max              15
_reflns_limit_k_min              0
_reflns_limit_l_max              31
_reflns_limit_l_min              0
_reflns_number_gt                1983
_reflns_number_total             2470
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   3.98
_oxford_diffrn_Wilson_scale      0.76
_oxford_refine_ls_r_factor_ref   0.0577
_oxford_refine_ls_scale          1.215(6)
_oxford_reflns_number_all        2470
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_iucr_refine_instructions_details_constraints
;
BLOCK SCALE X'S, U'S 
RIDE O   (   1,X'S) H   (  11,X'S) 
RIDE C   (   2,X'S) H   (  21,X'S) 
RIDE C   (   3,X'S) H   (  32,X'S) H   (  31,X'S) 
RIDE O   (   4,X'S) H   (  41,X'S) 
RIDE C   (   5,X'S) H   (  51,X'S) 
RIDE C   (   7,X'S) H   (  72,X'S) H   (  71,X'S) 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  10,X'S) H   ( 101,X'S) 
RIDE C   (  11,X'S) H   ( 111,X'S) 
RIDE C   (  12,X'S) H   ( 121,X'S) 
RIDE C   (  13,X'S) H   ( 131,X'S) 
RIDE C   (  14,X'S) H   ( 141,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) 
RIDE C   (  21,X'S) H   ( 213,X'S) H   ( 212,X'S) H   ( 211,X'S) 
RIDE C   (  22,X'S) H   ( 221,X'S) H   ( 222,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) 
END                                                                             
;
_iucr_refine_instructions_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;
_cod_data_source_file            jo6b00362_si_002.cif
_cod_data_source_block           58
_cod_original_formula_sum        'C25 H29 N1 O2'
_cod_database_code               4036730