Chiral Phosphine Oxide-Sc(OTf)3 Complex Catalyzed Enantioselective Bromoaminocyclization of 2-Benzofuranylmethyl N-Tosylcarbamates. Approach to a Novel Class of Optically Active Spiro Compounds.
Li, Zequan; Shi, Yian; Organic letters 17 (2015) 5752–5755; doi:10.1021/acs.orglett.5b02817

data_1555407
_publ_section_title
;
 Chiral Phosphine Oxide-Sc(OTf)3 Complex Catalyzed Enantioselective
 Bromoaminocyclization of 2-Benzofuranylmethyl N-Tosylcarbamates. Approach
 to a Novel Class of Optically Active Spiro Compounds.
;
_journal_issue                   23
_journal_name_full               'Organic letters'
_journal_page_first              5752
_journal_page_last               5755
_journal_paper_doi               10.1021/acs.orglett.5b02817
_journal_volume                  17
_journal_year                    2015
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C24 H21 N O6 S'
_chemical_formula_sum            'C24 H21 N O6 S'
_chemical_formula_weight         451.48
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2015-08-11
_audit_creation_method
;
Olex2 1.2
(compiled 2015.01.26 svn.r3150 for OlexSys, GUI svn.r4998)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.7963(6)
_cell_length_b                   11.5859(7)
_cell_length_c                   23.0860(17)
_cell_measurement_reflns_used    6340
_cell_measurement_temperature    173.1500
_cell_measurement_theta_max      27.4835
_cell_measurement_theta_min      1.7642
_cell_volume                     2085.3(3)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'CIFTAB (Sheldrick, 2013)'
_computing_structure_refinement  'SHELXL (Sheldrick, 2014)'
_computing_structure_solution
;
'SHELXT (Sheldrick, 2014)'
;
_diffrn_ambient_temperature      173.1500
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_details
;
scan:
	Number of images: 332
	           Slice: -110.0000 - 56.0000
	     Image width: 0.5000
	        Exp time: 5.0000
	   Rotation axis: Omega
	           Omega: 0.0000
	             Chi: 45.0000
	             Phi: 180.0000
	             XTD: 45.0794
	          2theta: -19.8998
scan:
	Number of images: 256
	           Slice: -80.0000 - 48.0000
	     Image width: 0.5000
	        Exp time: 5.0000
	   Rotation axis: Omega
	           Omega: 0.0000
	             Chi: 45.0000
	             Phi: 90.0000
	             XTD: 45.0794
	          2theta: -19.8998
;
_diffrn_measurement_device
;
Saturn724+ (2x2 bin mode)
;
_diffrn_measurement_device_details
;
AFC10: Fixed Chi 2 circle
;
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_orient_matrix_type       d*Trek
_diffrn_orient_matrix_UB_11      -0.1184
_diffrn_orient_matrix_UB_12      -0.0376
_diffrn_orient_matrix_UB_13      -0.0319
_diffrn_orient_matrix_UB_21      -0.0221
_diffrn_orient_matrix_UB_22      0.0821
_diffrn_orient_matrix_UB_23      -0.0146
_diffrn_orient_matrix_UB_31      0.0124
_diffrn_orient_matrix_UB_32      -0.0040
_diffrn_orient_matrix_UB_33      -0.0413
_diffrn_radiation_detector       CCD
_diffrn_radiation_monochromator  'Graphite Monochromator'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0347
_diffrn_reflns_av_unetI/netI     0.0356
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            13351
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         27.480
_diffrn_reflns_theta_min         2.491
_diffrn_source                   'Sealed Tube'
_diffrn_source_current           30.0000
_diffrn_source_power             1.5000
_diffrn_source_voltage           50.0000
_exptl_absorpt_coefficient_mu    0.199
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8268
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.438
_exptl_crystal_description       plate
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.63
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.253
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details
;
 Flack x determined using 1638 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   1.108
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     291
_refine_ls_number_reflns         4737
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.108
_refine_ls_R_factor_all          0.0465
_refine_ls_R_factor_gt           0.0431
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0341P)^2^+0.6545P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0905
_refine_ls_wR_factor_ref         0.0921
_reflns_Friedel_coverage         0.742
_reflns_Friedel_fraction_full    0.990
_reflns_Friedel_fraction_max     0.987
_reflns_number_gt                4497
_reflns_number_total             4737
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol5b02817_si_009.cif
_cod_data_source_block           sa4292
_cod_database_code               1555407
_diffrn_number_total             2749
_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:
 C2(H2)
2.b Secondary CH2 refined with riding coordinates:
 C16(H16A,H16B)
2.c Aromatic/amide H refined with riding coordinates:
 C4(H4), C5(H5), C6(H6), C7(H7), C10(H10), C11(H11), C13(H13), C14(H14),
 C19(H19), C20(H20), C22(H22), C23(H23)
2.d Idealised Me refined as rotating group:
 C15(H15A,H15B,H15C), C24(H24A,H24B,H24C)
;
_shelx_res_checksum              40264
_shelx_hkl_checksum              86552
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'