A convergent fragment coupling strategy to access quaternary stereogenic centers
Kerkovius, Jeff; Wong, Alice; Mak, Victor; Reisman, Sarah E.; Chemical Science  (2023) –; doi:10.1039/D2SC07023E

data_1568540
_publ_section_title
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 A convergent fragment coupling strategy to access quaternary stereogenic
 centers
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D2SC07023E
_journal_year                    2023
_chemical_formula_moiety         'C23 H30 O7 Si'
_chemical_formula_sum            'C23 H30 O7 Si'
_chemical_formula_weight         446.56
_chemical_name_common            ARW-II-297
_chemical_name_systematic        ARW-II-297
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2019-05-03
_audit_creation_method
;
Olex2 1.2
(compiled 2016.02.19 svn.r3266 for OlexSys, GUI svn.r5155)
;
_audit_update_record
;
2022-12-06 deposited with the CCDC.	2023-02-27 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   18.2041(15)
_cell_length_b                   12.7693(13)
_cell_length_c                   19.5076(18)
_cell_measurement_reflns_used    9858
_cell_measurement_temperature    100
_cell_measurement_theta_max      34.37
_cell_measurement_theta_min      2.37
_cell_volume                     4534.6(7)
_computing_cell_refinement       'SAINT v8.34A (Bruker-AXS, 2007)'
_computing_data_collection       'APEX2 v2014.11-0 (Bruker-AXS, 2014)'
_computing_data_reduction        'SAINT v8.34A (Bruker-AXS, 2007)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-2013/1 (She ldrick, 2013)'
_diffrn_ambient_temperature      100
_diffrn_detector                 'CMOS Area Detector'
_diffrn_detector_area_resol_mean 10.24
_diffrn_detector_type            'Bruker PHOTON 100 CMOS'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker D8 VENTURE Kappa Duo PHOTON 100 CMOS'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multilayer mirrors'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0810
_diffrn_reflns_av_unetI/netI     0.0316
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            135898
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         32.037
_diffrn_reflns_theta_min         2.210
_diffrn_source                   'I\mS HB micro-focus sealed tube'
_diffrn_source_current           1
_diffrn_source_power             0.05
_diffrn_source_type              'Incoatech I\mS HB'
_diffrn_source_voltage           50
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.145
_exptl_absorpt_correction_T_max  0.7468
_exptl_absorpt_correction_T_min  0.6970
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS-2014/5 (Sheldrick, 2014)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.308
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1904
_exptl_crystal_size_max          0.188
_exptl_crystal_size_mid          0.151
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.412
_refine_diff_density_min         -0.287
_refine_diff_density_rms         0.055
_refine_ls_extinction_coef       0.0014(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.090
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     287
_refine_ls_number_reflns         7877
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.090
_refine_ls_R_factor_all          0.0621
_refine_ls_R_factor_gt           0.0443
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0412P)^2^+2.2580P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0997
_refine_ls_wR_factor_ref         0.1053
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6288
_reflns_number_total             7877
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2sc07023e2.cif
_cod_data_source_block           p16149_a
_cod_database_code               1568540
_shelx_estimated_absorpt_t_max   0.993
_shelx_estimated_absorpt_t_min   0.973
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C5(H5), C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C3(H3A,H3B), C6(H6A,H6B)
2.c Aromatic/amide H refined with riding coordinates:
 C12(H12), C10(H10), C14(H14)
2.d Idealised Me refined as rotating group:
 C19(H19A,H19B,H19C), C21(H21A,H21B,H21C), C20(H20A,H20B,H20C), C22(H22A,H22B,
 H22C), C15(H15A,H15B,H15C), C23(H23A,H23B,H23C)
;
_shelx_res_checksum              69638
_shelx_hkl_checksum              72257
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'