N-Heterocyclic Carbene Catalyzed Reaction of Phthalaldehydes: Controllable Stereoselective Synthesis of Polyhydroxylated Spiro- and Fused Indenones Dictated by the Structure of NHC Catalysts
Ying Cheng; Jiang-Hua Peng; Yong-Jia Li; Xun-Yu Shi; Ming-Sheng Tang; Tian-Yu Tan; Journal of Organic Chemistry 76 (2011) 1844–1851; doi:10.1021/jo102582a

data_4026143
_publ_section_title
;
 N-Heterocyclic Carbene Catalyzed Reaction of Phthalaldehydes:
 Controllable Stereoselective Synthesis of Polyhydroxylated Spiro- and
 Fused Indenones Dictated by the Structure of NHC Catalysts
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1844
_journal_page_last               1851
_journal_paper_doi               10.1021/jo102582a
_journal_volume                  76
_journal_year                    2011
_chemical_formula_moiety         'C16 H12 O4'
_chemical_formula_sum            'C16 H12 O4'
_chemical_formula_weight         268.26
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 97.964(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   5.1389(3)
_cell_length_b                   54.219(4)
_cell_length_c                   18.2513(13)
_cell_measurement_reflns_used    5869
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      27.1
_cell_measurement_theta_min      1.2
_cell_volume                     5036.2(6)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalClear
_computing_publication_material  'CrystalStructure 3.7.0'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      113(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.977
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Rigaku Saturn CCD area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0827
_diffrn_reflns_av_sigmaI/netI    0.1065
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       64
_diffrn_reflns_limit_k_min       -64
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            24793
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.19
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.9980
_exptl_absorpt_correction_T_min  0.9681
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   Crystalclear
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.415
_exptl_crystal_description       prism
_exptl_crystal_F_000             2240
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.278
_refine_diff_density_min         -0.288
_refine_diff_density_rms         0.061
_refine_ls_extinction_coef       0.0043(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     746
_refine_ls_number_reflns         8659
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.1141
_refine_ls_R_factor_gt           0.0721
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0663P)^2^+0.7286P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1488
_refine_ls_wR_factor_ref         0.1681
_reflns_number_gt                5897
_reflns_number_total             8659
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo102582a_si_001.cif
_cod_data_source_block           shelxl
_cod_database_code               4026143