Enantioselective Addition-Alkylation of α,β-Unsaturated Carbonyls via Bisguanidinium Silicate Ion Pair Catalysis
Chen, Wenchao; Ang, Esther Cai Xia; Tan, Siu Min; Chua, Zhijie; Ren, Jingyun; Yang, Ziqi; Teng, Bo; Lee, Richmond; Lu, Haihua; Tan, Choon-Hong; Journal of the American Chemical Society  (2020) –; doi:10.1021/jacs.0c00183

data_4135316
_publ_section_title
;
 Enantioselective Addition-Alkylation of \a,\b-Unsaturated Carbonyls via
 Bisguanidinium Silicate Ion Pair Catalysis
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.0c00183
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_sum            'C26 H19 N O2'
_chemical_formula_weight         377.42
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     'Dual Space'
_audit_creation_method           SHELXL-2017/1
_cell_angle_alpha                90
_cell_angle_beta                 91.787(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.3925(7)
_cell_length_b                   22.0153(17)
_cell_length_c                   9.7818(7)
_cell_measurement_reflns_used    9877
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      70.15
_cell_measurement_theta_min      4.71
_cell_volume                     2021.7(3)
_computing_cell_refinement       'APEX3 v2018.1-0 (Bruker AXS)'
_computing_data_collection       'APEX3 (Bruker AXS)'
_computing_data_reduction        'SAINT V8.32B (Bruker AXS Inc., 2014)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL--2014 (Sheldrick 2014)'
_computing_structure_solution    'SHELXT--(Sheldrick 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker D8 venture'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0258
_diffrn_reflns_av_unetI/netI     0.0142
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            90357
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         70.195
_diffrn_reflns_theta_min         4.016
_diffrn_source                   'Microfocus Sealed Tube'
_exptl_absorpt_coefficient_mu    0.619
_exptl_absorpt_correction_T_max  0.8644
_exptl_absorpt_correction_T_min  0.7929
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs, (Sheldrick 2012)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.240
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.374
_exptl_crystal_size_mid          0.238
_exptl_crystal_size_min          0.170
_refine_diff_density_max         0.196
_refine_diff_density_min         -0.214
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details
; 
 Flack x determined using 3630 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.01(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     523
_refine_ls_number_reflns         7612
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0303
_refine_ls_R_factor_gt           0.0303
_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^)+(0.0546P)^2^+0.3593P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0793
_refine_ls_wR_factor_ref         0.0794
_reflns_Friedel_coverage         0.927
_reflns_Friedel_fraction_full    0.984
_reflns_Friedel_fraction_max     0.979
_reflns_number_gt                7603
_reflns_number_total             7612
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c00183_si_006.cif
_cod_data_source_block           K178
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

data item '_exptl_crystal_density_meas' value 'Not Measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4135316
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.801
_shelx_estimated_absorpt_t_max   0.902
_computing_bruker_data_scaling   'SADABS V2018/1 (Bruker AXS Inc.)'
_shelx_res_checksum              66151
_shelx_hkl_checksum              57821