Phosphine-Catalyzed [4 + 2] Annulation: Synthesis of Cyclohexenes
Yang S. Tran; Ohyun Kwon; Journal of the American Chemical Society 129 (2007) 12632–12633; doi:10.1021/ja0752181

data_4110054
_publ_section_title
;
 Phosphine-Catalyzed [4 + 2] Annulation: Synthesis of Cyclohexenes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12632
_journal_page_last               12633
_journal_paper_doi               10.1021/ja0752181
_journal_volume                  129
_journal_year                    2007
_chemical_formula_moiety         'C20 H19 N3 O2'
_chemical_formula_sum            'C20 H19 N3 O2'
_chemical_formula_weight         333.38
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 106.354(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.644(2)
_cell_length_b                   18.090(5)
_cell_length_c                   12.853(3)
_cell_measurement_reflns_used    2247
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      24.80
_cell_measurement_theta_min      3.84
_cell_volume                     1705.4(8)
_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      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0967
_diffrn_reflns_av_sigmaI/netI    0.0991
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            13031
_diffrn_reflns_theta_full        26.47
_diffrn_reflns_theta_max         26.47
_diffrn_reflns_theta_min         3.76
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.9957
_exptl_absorpt_correction_T_min  0.9815
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'sadabs (Bruker)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.298
_exptl_crystal_description       platelet
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.226
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.990
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         3514
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.990
_refine_ls_R_factor_all          0.1330
_refine_ls_R_factor_gt           0.0564
_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^)+(0.0485P)^2^+0.2702P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1090
_refine_ls_wR_factor_ref         0.1356
_reflns_number_gt                1892
_reflns_number_total             3514
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0752181si20070712_094707.cif
_cod_data_source_block           kw407s
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4110054