Bifunctional phosphine-catalyzed domino reaction: highly stereoselective synthesis of cis-2,3-dihydrobenzofurans from salicyl N-thiophosphinyl imines and allenes.
Meng, Xiangtai; Huang, You; Chen, Ruyu; Organic letters 11 (2009) 137–140; doi:10.1021/ol802453c

data_1503730
_publ_section_title
;
 Bifunctional phosphine-catalyzed domino reaction: highly stereoselective
 synthesis of cis-2,3-dihydrobenzofurans from salicyl N-thiophosphinyl
 imines and allenes.
;
_journal_issue                   1
_journal_name_full               'Organic letters'
_journal_page_first              137
_journal_page_last               140
_journal_paper_doi               10.1021/ol802453c
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C25 H23 Br N O3 P S'
_chemical_formula_sum            'C25 H23 Br N O3 P S'
_chemical_formula_weight         528.38
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.733(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.291(3)
_cell_length_b                   23.680(7)
_cell_length_c                   11.160(4)
_cell_measurement_reflns_used    6766
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      27.9
_cell_measurement_theta_min      1.9
_cell_volume                     2351.4(13)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalClear
_computing_publication_material  'CrystalStructure 3.7.0'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      113(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku Saturn'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_source         'Rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0506
_diffrn_reflns_av_sigmaI/netI    0.1050
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            17362
_diffrn_reflns_theta_full        27.87
_diffrn_reflns_theta_max         27.87
_diffrn_reflns_theta_min         1.91
_exptl_absorpt_coefficient_mu    1.933
_exptl_absorpt_correction_T_max  0.7223
_exptl_absorpt_correction_T_min  0.6758
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   CrystalClear
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.493
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1080
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.417
_refine_diff_density_min         -0.495
_refine_diff_density_rms         0.082
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.001(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.914
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     588
_refine_ls_number_reflns         9757
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      0.913
_refine_ls_R_factor_all          0.0606
_refine_ls_R_factor_gt           0.0428
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0206P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0749
_refine_ls_wR_factor_ref         0.0832
_reflns_number_gt                7537
_reflns_number_total             9757
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol802453c_si_002.cif
_cod_data_source_block           shelxl
_cod_original_cell_volume        2351.3(13)
_cod_database_code               1503730