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_7234160
_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         'C24 H27 N O5'
_chemical_formula_sum            'C24 H27 N O5'
_chemical_formula_weight         409.48
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2018-03-28
_audit_creation_method           'by CrystalStructure 4.3'
_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                 90.0000
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   6.24701(5)
_cell_length_b                   17.78990(14)
_cell_length_c                   20.26860(16)
_cell_measurement_reflns_used    21724
_cell_measurement_temperature    125
_cell_measurement_theta_max      75.20
_cell_measurement_theta_min      3.26
_cell_volume                     2252.52(3)
_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 4.3'
_computing_publication_material  'CrystalStructure 4.3 (Rigaku, 2018)'
_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 0.998
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Rigaku XtaLAB P200'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0203
_diffrn_reflns_av_unetI/netI     0.0119
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            26719
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.981
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         75.563
_diffrn_reflns_theta_min         3.305
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.688
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.726
_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    1.207
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             872.00
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.020
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.80
_refine_diff_density_min         -0.35
_refine_ls_abs_structure_details
;
 Flack x determined using 1866 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.00(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4594
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0459
_refine_ls_R_factor_gt           0.0454
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0915P)^2^+0.5780P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1325
_refine_ls_wR_factor_ref         0.1331
_reflns_Friedel_coverage         0.721
_reflns_Friedel_fraction_full    0.996
_reflns_Friedel_fraction_max     0.969
_reflns_number_gt                4503
_reflns_number_total             4594
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c9ra07244f2.cif
_cod_data_source_block           25
_cod_database_code               7234160
_shelx_res_checksum              16757