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_4026145
_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         'C21 H20 O5'
_chemical_formula_sum            'C21 H20 O5'
_chemical_formula_weight         352.37
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                94.061(2)
_cell_angle_beta                 95.186(2)
_cell_angle_gamma                102.320(2)
_cell_formula_units_Z            4
_cell_length_a                   12.4406(13)
_cell_length_b                   12.7749(14)
_cell_length_c                   15.6575(16)
_cell_measurement_reflns_used    3218
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      25.12
_cell_measurement_theta_min      2.44
_cell_volume                     2410.7(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0469
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            8623
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.069
_exptl_absorpt_correction_T_max  0.9877
_exptl_absorpt_correction_T_min  0.9755
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    0.971
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.18
_platon_squeeze_details
;
;
_refine_diff_density_max         0.267
_refine_diff_density_min         -0.215
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     478
_refine_ls_number_reflns         8623
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0746
_refine_ls_R_factor_gt           0.0548
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0946P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1499
_refine_ls_wR_factor_ref         0.1614
_reflns_number_gt                6207
_reflns_number_total             8623
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo102582a_si_003.cif
_cod_data_source_block           101222c_0m
_cod_database_code               4026145