Diastereoselective Borocyclopropanation of Allylic Ethers Using a Boromethylzinc Carbenoid.
Benoit, Guillaume; Charette, André B; Journal of the American Chemical Society 139 (2017) 1364–1367; doi:10.1021/jacs.6b09090

data_4125721
_publ_section_title
;
 Diastereoselective Borocyclopropanation of Allylic Ethers Using a
 Boromethylzinc Carbenoid.
;
_journal_issue                   4
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1364
_journal_page_last               1367
_journal_paper_doi               10.1021/jacs.6b09090
_journal_volume                  139
_journal_year                    2017
_chemical_formula_moiety         'C22 H37 B O3 Si'
_chemical_formula_sum            'C22 H37 B O3 Si'
_chemical_formula_weight         388.41
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2015-12-17
_audit_creation_method
;
Olex2 1.2
(compiled 2015.09.30 svn.r3233 for OlexSys, GUI svn.r5103)
;
_cell_angle_alpha                90
_cell_angle_beta                 92.3994(18)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.6124(3)
_cell_length_b                   11.5841(5)
_cell_length_c                   30.0883(11)
_cell_measurement_reflns_used    7651
_cell_measurement_temperature    100
_cell_measurement_theta_max      70.156
_cell_measurement_theta_min      2.940
_cell_volume                     2302.70(17)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_collection
;
APEX 2 (2013) Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_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    'XS (Sheldrick, 2008)'
_diffrn_ambient_temperature      100
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 8.3
_diffrn_detector_type            'Bruker Platinum 135 CCD Area Detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device       'k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker Microstar X8'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_collimation    'Focusing mirrors'
_diffrn_radiation_monochromator  'Helios Mirror Optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0486
_diffrn_reflns_av_unetI/netI     0.0282
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.991
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            31240
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         72.286
_diffrn_reflns_theta_min         2.940
_diffrn_source                   'Rotating-anode X-ray tube'
_diffrn_source_target            Cu
_diffrn_source_type              'Bruker Microstar/FR591 generator'
_exptl_absorpt_coefficient_mu    1.029
_exptl_absorpt_correction_T_max  0.7533
_exptl_absorpt_correction_T_min  0.6534
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014/5) was used for absorption correction.
wR2(int) was 0.0903 before and 0.0612 after correction.
The Ratio of minimum to maximum transmission is 0.8674.
The \l/2 correction factor is 0.00150.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.120
_exptl_crystal_description       block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.918
_refine_diff_density_min         -0.362
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     294
_refine_ls_number_reflns         4511
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0769
_refine_ls_R_factor_gt           0.0702
_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^)+(0.0960P)^2^+2.4470P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1892
_refine_ls_wR_factor_ref         0.1948
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3958
_reflns_number_total             4511
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja6b09090_si_004.cif
_cod_data_source_block           sylv21
_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               4125721
_shelx_estimated_absorpt_t_max   0.960
_shelx_estimated_absorpt_t_min   0.853
_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. Others
 Sof(C6B)=Sof(H6BA)=Sof(H6BB)=Sof(H6BC)=Sof(C7B)=Sof(H7BA)=Sof(H7BB)=Sof(H7BC)=
 Sof(C8B)=Sof(H8BA)=Sof(H8BB)=Sof(H8BC)=Sof(C9B)=Sof(H9BA)=Sof(H9BB)=Sof(H9BC)=
 1-FVAR(1)
 Sof(C6A)=Sof(H6AA)=Sof(H6AB)=Sof(H6AC)=Sof(C7A)=Sof(H7AA)=Sof(H7AB)=Sof(H7AC)=
 Sof(C8A)=Sof(H8AA)=Sof(H8AB)=Sof(H8AC)=Sof(C9A)=Sof(H9AA)=Sof(H9AB)=Sof(H9AC)=
 FVAR(1)
3.a Ternary CH refined with riding coordinates:
 C1(H1), C2(H2), C3(H3)
3.b Secondary CH2 refined with riding coordinates:
 C16(H16A,H16B)
3.c Aromatic/amide H refined with riding coordinates:
 C11(H11), C12(H12), C13(H13), C14(H14), C15(H15)
3.d Idealised Me refined as rotating group:
 C6A(H6AA,H6AB,H6AC), C7A(H7AA,H7AB,H7AC), C8A(H8AA,H8AB,H8AC), C9A(H9AA,H9AB,
 H9AC), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C), C20(H20A,H20B,H20C), C21(H21A,
 H21B,H21C), C22(H22A,H22B,H22C), C6B(H6BA,H6BB,H6BC), C7B(H7BA,H7BB,H7BC),
 C8B(H8BA,H8BB,H8BC), C9B(H9BA,H9BB,H9BC)
;
_shelx_res_checksum              42530
_shelx_hkl_checksum              12353
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'