Synthesis of Substituted Tetralins and Benzosuberans via BF3·OEt2-Mediated Formal (4 + 2) and (5 + 2) Stereocontrolled Cycloaddition of 4-Alkenols with Veratrol.
Chang, Meng-Yang; Cheng, Yu-Chieh; Organic letters 18 (2016) 608–611; doi:10.1021/acs.orglett.5b03696

data_1541929
_publ_section_title
;
 Synthesis of Substituted Tetralins and Benzosuberans via
 BF3&#x00B7;OEt2-Mediated Formal (4 + 2) and (5 + 2) Stereocontrolled
 Cycloaddition of 4-Alkenols with Veratrol.
;
_journal_issue                   3
_journal_name_full               'Organic letters'
_journal_page_first              608
_journal_page_last               611
_journal_paper_doi               10.1021/acs.orglett.5b03696
_journal_volume                  18
_journal_year                    2016
_chemical_formula_sum            'C25 H25 F O2'
_chemical_formula_weight         376.45
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_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-2014/6
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_cell_angle_beta                 110.397(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.3721(7)
_cell_length_b                   18.7809(11)
_cell_length_c                   10.7938(6)
_cell_measurement_reflns_used    5885
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.3432
_cell_measurement_theta_min      2.3590
_cell_volume                     1970.8(2)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'APEX2 (Bruker AXS, 2010)'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
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_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
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_diffrn_detector_area_resol_mean 8.3333
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_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
_diffrn_radiation_wavelength     0.71073
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_diffrn_reflns_Laue_measured_fraction_full 0.997
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_diffrn_reflns_limit_h_max       12
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_diffrn_reflns_limit_k_min       -23
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_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            16212
_diffrn_reflns_point_group_measured_fraction_full 0.997
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_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.383
_diffrn_reflns_theta_min         2.095
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9485
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_exptl_absorpt_correction_type   multi-scan
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_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.269
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lump
_exptl_crystal_F_000             800
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     256
_refine_ls_number_reflns         4013
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.115
_refine_ls_R_factor_all          0.0556
_refine_ls_R_factor_gt           0.0420
_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^)+(0.0739P)^2^+0.2329P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1217
_refine_ls_wR_factor_ref         0.1387
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3165
_reflns_number_total             4013
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol5b03696_si_004.cif
_cod_data_source_block           150615_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 1541918--1541929.cif.
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_cod_database_code               1541929
_shelxl_version_number           2014/6
_shelx_res_checksum              59883
_shelx_hkl_checksum              71000