Efficient asymmetric synthesis of spiro-2(3H)-furanones via phase-transfer-catalyzed alkynylation.
Wu, Xiangfei; Shirakawa, Seiji; Maruoka, Keiji; Organic & biomolecular chemistry 12 (2014) 5388–5392; doi:10.1039/c4ob00969j

data_7153909
_publ_section_title
;
 Efficient asymmetric synthesis of spiro-2(3H)-furanones via
 phase-transfer-catalyzed alkynylation.
;
_journal_issue                   29
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              5388
_journal_page_last               5392
_journal_paper_doi               10.1039/c4ob00969j
_journal_volume                  12
_journal_year                    2014
_chemical_formula_moiety         'C24 H16 O3 Se'
_chemical_formula_sum            'C24 H16 O3 Se'
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_atom_sites_solution_secondary   difmap
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_cell_angle_beta                 90.0000
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   9.96379(18)
_cell_length_b                   10.04828(18)
_cell_length_c                   19.6441(4)
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_cell_measurement_temperature    123
_cell_measurement_theta_max      68.08
_cell_measurement_theta_min      4.44
_cell_volume                     1966.75(6)
_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO (Rigaku, ????)'
_computing_data_reduction        'RAPID AUTO'
_computing_molecular_graphics    'CrystalStructure 4.0'
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_computing_structure_solution    SIR97
_diffrn_ambient_temperature      123
_diffrn_detector_area_resol_mean 10.000
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_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
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_diffrn_reflns_av_R_equivalents  0.0632
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_exptl_absorpt_correction_T_min  0.599
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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_abs_structure_details
'Flack, H. D. (1983), Acta Cryst. A39, 876-881.  1494 Friedel Pairs'
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_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.2220
_reflns_number_gt                2814
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_cod_depositor_comments          'Adding full bibliography for 7153909.cif.'
_cod_original_cell_volume        1966.75(7)
_cod_database_code               7153909