B(C6F5)3-Catalyzed Formal [4+1]-Annulation of ortho-Quinone Methides with Diazoacetates: Access to 2,3-Dihydrobenzofurans
Xu, Guangyang; Tang, Sheng-Biao; Shao, Ying; Sun, Jiangtao; Chemical Communications  (2019) –; doi:10.1039/C9CC04863D

data_7123786
_publ_section_title
;
 B(C6F5)3-Catalyzed Formal [4+1]-Annulation of ortho-Quinone Methides with
 Diazoacetates: Access to 2,3-Dihydrobenzofurans
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C9CC04863D
_journal_year                    2019
_chemical_formula_sum            'C23 H20 O3'
_chemical_formula_weight         344.39
_space_group_crystal_system      monoclinic
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_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2019-06-14 deposited with the CCDC.    2019-07-05 downloaded from the CCDC.
;
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_cell_angle_gamma                90
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_cell_volume                     1780.9(3)
_computing_cell_refinement       'Bruker SAINT'
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_computing_molecular_graphics    'Bruker SHELXTL'
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_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT 2014/4 (Sheldrick, 2014)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
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_diffrn_reflns_point_group_measured_fraction_full 0.997
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0531P)^2^+0.8601P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1122
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_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cc04863d2.cif
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