Total Synthesis and Stereochemical Assignment of Streptide.
Isley, Nicholas A.; Endo, Yusuke; Wu, Zhi-Chen; Covington, Brett C.; Bushin, Leah B.; Seyedsayamdost, Mohammad R.; Boger, Dale L.; Journal of the American Chemical Society 141 (2019) 17361–17369; doi:10.1021/jacs.9b09067

data_4127901
_publ_section_title
;
 Total Synthesis and Stereochemical Assignment of Streptide.
;
_journal_issue                   43
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              17361
_journal_page_last               17369
_journal_paper_doi               10.1021/jacs.9b09067
_journal_volume                  141
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C38 H34 Br N5 O6 S'
_chemical_formula_sum            'C38 H34 Br N5 O6 S'
_chemical_formula_weight         768.67
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2018-09-18
_audit_creation_method
;
Olex2 1.2-beta
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.6634(2)
_cell_length_b                   16.5163(3)
_cell_length_c                   27.5414(5)
_cell_measurement_reflns_used    9955
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      68.254
_cell_measurement_theta_min      3.120
_cell_volume                     3485.94(13)
_computing_cell_refinement       'SAINT v8.38A (Bruker, 2017)'
_computing_data_collection       'APEX3 v2017.3-0 (Bruker, 2017)'
_computing_data_reduction        'SAINT v8.38A (Bruker, 2017)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100.0
_diffrn_detector                 'Bruker APEX-II CCD'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD Area Detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'Fixed Chi Three-Circle Diffractometer'
_diffrn_measurement_device_type  'Bruker D8 APEX II'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'Double Bounce Multilayer Mirrors'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0332
_diffrn_reflns_av_unetI/netI     0.0339
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            25223
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        68.000
_diffrn_reflns_theta_max         68.365
_diffrn_reflns_theta_min         3.120
_diffrn_source                   'Micro Focus Rotating Anode'
_diffrn_source_type              'Rigaku MicroMax-007HF'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.627
_exptl_absorpt_correction_T_max  0.3201
_exptl_absorpt_correction_T_min  0.1969
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1401 before and 0.0603 after correction. The Ratio of minimum to maximum transmission is 0.6151. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            Colorless
_exptl_crystal_colour_primary    Colorless
_exptl_crystal_density_diffrn    1.465
_exptl_crystal_description       Needle
_exptl_crystal_F_000             1584
_exptl_crystal_size_max          0.471
_exptl_crystal_size_mid          0.056
_exptl_crystal_size_min          0.028
_refine_diff_density_max         0.723
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.063
_refine_ls_abs_structure_details
;
 Flack x determined using 2572 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.004(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     471
_refine_ls_number_reflns         6384
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0378
_refine_ls_R_factor_gt           0.0363
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0680P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0902
_refine_ls_wR_factor_ref         0.0911
_reflns_Friedel_coverage         0.759
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                6125
_reflns_number_total             6384
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja9b09067_si_004.cif
_cod_data_source_block           Boger91
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' according
to
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_database_code               4127901
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.930
_shelx_estimated_absorpt_t_min   0.371
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 N1-H1 = N3-H3 = N4-H4
 0.95 with sigma of 0.02
3.a Ternary CH refined with riding coordinates:
 C2(H2), C3(H3A)
3.b Secondary CH2 refined with riding coordinates:
 C10(H10A,H10B), C11(H11A,H11B), C12(H12A,H12B)
3.c Aromatic/amide H refined with riding coordinates:
 C7(H7), C8(H8), C9(H9), C14(H14), C15(H15), C16(H16), C19(H19), C20(H20),
 C21(H21), C26(H26), C27(H27), C28(H28), C29(H29), C33(H33), C34(H34), C36(H36),
  C37(H37)
3.d Idealised Me refined as rotating group:
 C31(H31A,H31B,H31C), C38(H38A,H38B,H38C)
;
_shelx_res_checksum              87446
_shelx_hkl_checksum              16352
_olex2_submission_special_instructions 'No special instructions were received'