Atom Efficient Synthesis of Selectively Difluorinated Carbocycles through a Gold(I)-Catalyzed Cyclization.
McCarter, Adam W.; Sommer, Magdalena; Percy, Jonathan M.; Jamieson, Craig; Kennedy, Alan R.; Hirst, David J.; The Journal of organic chemistry 83 (2018) 8888–8905; doi:10.1021/acs.joc.8b01121

data_4035339
_publ_section_title
;
 Atom Efficient Synthesis of Selectively Difluorinated Carbocycles through
 a Gold(I)-Catalyzed Cyclization.
;
_journal_issue                   16
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              8888
_journal_page_last               8905
_journal_paper_doi               10.1021/acs.joc.8b01121
_journal_volume                  83
_journal_year                    2018
_chemical_formula_sum            'C10 H16 F2 O2'
_chemical_formula_weight         206.23
_space_group_IT_number           56
_space_group_name_Hall           '-P 2ac 2bc'
_space_group_name_H-M_alt        'P n a a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P n a a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   9.904(2)
_cell_length_b                   22.127(7)
_cell_length_c                   9.113(2)
_cell_measurement_reflns_used    2316
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      26.7813
_cell_measurement_theta_min      3.1643
_cell_volume                     1997.1(9)
_computing_cell_refinement       CrysalisPro
_computing_data_collection       CrysalisPro
_computing_data_reduction        CrysalisPro
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    SIR92
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur E'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1439
_diffrn_reflns_av_sigmaI/netI    0.0706
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            10320
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         3.17
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.62526
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.40 (release 27-08-2010 CrysAlis171 .NET)
(compiled Aug 27 2010,11:50:40)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.372
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'plate cut from mass'
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.276
_refine_diff_density_min         -0.291
_refine_diff_density_rms         0.072
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     135
_refine_ls_number_reflns         1747
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.1202
_refine_ls_R_factor_gt           0.0854
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1242P)^2^+1.0150P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2166
_refine_ls_wR_factor_ref         0.2508
_reflns_number_gt                1112
_reflns_number_total             1747
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo8b01121_si_002.cif
_cod_data_source_block           jamie_adammc
_cod_original_sg_symbol_H-M      Pnaa
_cod_database_code               4035339