Formal synthesis of (+)-lactacystin from l-serine
Bulman Page, Philip C.; Goodyear, Ross L.; Chan, Yohan; Slawin, Alexandra M. Z.; Allin, Steven M.; RSC Advances 9 (2019) 30019–; doi:10.1039/C9RA07244F

data_7234161
_publ_section_title
;
 Formal synthesis of (+)-lactacystin from l-serine
;
_journal_issue                   51
_journal_name_full               'RSC Advances'
_journal_page_first              30019
_journal_paper_doi               10.1039/C9RA07244F
_journal_volume                  9
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C28 H33 N O8'
_chemical_formula_sum            'C28 H33 N O8'
_chemical_formula_weight         511.57
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2017-08-15
_audit_creation_method           'by CrystalStructure 4.2'
_audit_update_record
;
2019-05-14 deposited with the CCDC.    2019-09-12 downloaded from the CCDC.
;
_cell_angle_alpha                90.0000
_cell_angle_beta                 98.891(2)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   10.3313(2)
_cell_length_b                   10.2519(2)
_cell_length_c                   26.4465(6)
_cell_measurement_reflns_used    14945
_cell_measurement_temperature    125
_cell_measurement_theta_max      67.72
_cell_measurement_theta_min      1.68
_cell_volume                     2767.44(10)
_computing_cell_refinement       'CrysAlisPro 1.171.39.8d (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.39.8d (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.39.8d (Rigaku OD, 2015)'
_computing_molecular_graphics    'CrystalStructure 4.2'
_computing_publication_material  'CrystalStructure 4.2 (Rigaku, 2015)'
_computing_structure_refinement  'SHELXL Version 2014/7 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT Version 2014/4 (Sheldrick, 2014)'
_diffrn_ambient_temperature      125
_diffrn_detector_area_resol_mean 5.811
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type  'Rigaku XtaLAB P200'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54187
_diffrn_reflns_av_R_equivalents  0.0295
_diffrn_reflns_Laue_measured_fraction_full 0.982
_diffrn_reflns_Laue_measured_fraction_max 0.976
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            22931
_diffrn_reflns_point_group_measured_fraction_full 0.926
_diffrn_reflns_point_group_measured_fraction_max 0.919
_diffrn_reflns_theta_full        67.687
_diffrn_reflns_theta_max         68.206
_diffrn_reflns_theta_min         1.691
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.745
_exptl_absorpt_correction_T_max  0.928
_exptl_absorpt_correction_T_min  0.772
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.8d (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.228
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1088.00
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.30
_refine_diff_density_min         -0.23
_refine_ls_abs_structure_details
;
 Flack x determined using 3469 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.06(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     667
_refine_ls_number_reflns         9321
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0714
_refine_ls_R_factor_gt           0.0691
_refine_ls_shift/su_max          0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.1400P)^2^+0.7186P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2011
_refine_ls_wR_factor_ref         0.2038
_reflns_Friedel_coverage         0.776
_reflns_Friedel_fraction_full    0.863
_reflns_Friedel_fraction_max     0.856
_reflns_number_gt                8699
_reflns_number_total             9321
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c9ra07244f2.cif
_cod_data_source_block           26
_cod_database_code               7234161
_shelx_res_checksum              32777