Syntheses of Polycyclic Tetrahydrofurans by Cascade Reactions Consisting of Five-Membered Ring Selective Prins Cyclization and Friedel-Crafts Cyclization.
Sakata, Yuki; Yasui, Eiko; Takatori, Kazuhiko; Suzuki, Yuji; Mizukami, Megumi; Nagumo, Shinji; The Journal of organic chemistry 83 (2018) 9103–9118; doi:10.1021/acs.joc.8b01195

data_4035384
_publ_section_title
;
 Syntheses of Polycyclic Tetrahydrofurans by Cascade Reactions Consisting
 of Five-Membered Ring Selective Prins Cyclization and Friedel-Crafts
 Cyclization.
;
_journal_issue                   16
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              9103
_journal_page_last               9118
_journal_paper_doi               10.1021/acs.joc.8b01195
_journal_volume                  83
_journal_year                    2018
_chemical_formula_moiety         'C31 H36 O6'
_chemical_formula_sum            'C31 H36 O6'
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_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.0000
_cell_angle_beta                 103.888(7)
_cell_angle_gamma                90.0000
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_cell_length_b                   10.3428(3)
_cell_length_c                   17.6768(5)
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_cell_measurement_theta_max      68.07
_cell_measurement_theta_min      3.04
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_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO (Rigaku, ????)'
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_computing_structure_solution    'SHELXT Version 2014/4 (Sheldrick, 2014)'
_diffrn_ambient_temperature      93
_diffrn_detector_area_resol_mean 10.000
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_diffrn_measurement_method       \w
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_diffrn_reflns_av_R_equivalents  0.0223
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_diffrn_reflns_theta_min         3.036
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_exptl_absorpt_correction_T_min  0.759
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_exptl_crystal_colour            colorless
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_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
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_refine_ls_number_reflns         4832
_refine_ls_number_restraints     0
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_refine_ls_R_factor_gt           0.0383
_refine_ls_shift/su_max          0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0547P)^2^+0.9538P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1007
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