A general method for the catalytic nazarov cyclization of heteroaromatic compounds.
Malona, John A.; Colbourne, Jessica M.; Frontier, Alison J.; Organic letters 8 (2006) 5661–5664; doi:10.1021/ol062403v

data_1506300
_publ_section_title
;
 A general method for the catalytic nazarov cyclization of heteroaromatic
 compounds.
;
_journal_issue                   24
_journal_name_full               'Organic letters'
_journal_page_first              5661
_journal_page_last               5664
_journal_paper_doi               10.1021/ol062403v
_journal_volume                  8
_journal_year                    2006
_chemical_formula_moiety         'C12 H15 N O3'
_chemical_formula_sum            'C12 H15 N O3'
_chemical_formula_weight         221.25
_chemical_name_common            frojm02
_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                 96.931(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.9577(18)
_cell_length_b                   9.0799(15)
_cell_length_c                   11.3076(19)
_cell_measurement_reflns_used    3941
_cell_measurement_temperature    100.0(1)
_cell_measurement_theta_max      31.05
_cell_measurement_theta_min      2.76
_cell_volume                     1116.8(3)
_computing_cell_refinement       'SAINT, Bruker'
_computing_data_collection       'APEX2, Bruker'
_computing_data_reduction        'SAINT, Bruker'
_computing_molecular_graphics    'SHELXTL, Bruker'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97, CNR-IC'
_diffrn_ambient_temperature      100.0(1)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART APEX II CCD Platform'
_diffrn_measurement_method       'area detector, \w scans per \f'
_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  0.0210
_diffrn_reflns_av_sigmaI/netI    0.0168
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12550
_diffrn_reflns_theta_full        30.03
_diffrn_reflns_theta_max         30.03
_diffrn_reflns_theta_min         2.45
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.9767
_exptl_absorpt_correction_T_min  0.9586
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing, 1995'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.431
_refine_diff_density_min         -0.223
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     205
_refine_ls_number_reflns         3247
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0392
_refine_ls_R_factor_gt           0.0353
_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^)+(0.0593P)^2^+0.2536P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0970
_refine_ls_wR_factor_ref         0.0999
_reflns_number_gt                2898
_reflns_number_total             3247
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol062403vsi20060929_042530.cif
_cod_data_source_block           frojm02
_cod_database_code               1506300