Synthetic study on tetrapetalones: stereoselective cyclization of N-acyliminium ion to construct substituted 1-benzazepines.
Li, Cheng; Li, Xinyu; Hong, Ran; Organic letters 11 (2009) 4036–4039; doi:10.1021/ol901349b

data_1504066
_publ_section_title
;
 Synthetic study on tetrapetalones: stereoselective cyclization of
 N-acyliminium ion to construct substituted 1-benzazepines.
;
_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              4036
_journal_page_last               4039
_journal_paper_doi               10.1021/ol901349b
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration rm
_chemical_formula_sum            'C16 H17 N O3'
_chemical_formula_weight         271.31
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.6034(3)
_cell_length_b                   12.7414(5)
_cell_length_c                   13.9945(5)
_cell_measurement_reflns_used    3704
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      28.99
_cell_measurement_theta_min      3.05
_cell_volume                     1355.76(9)
_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      296(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0188
_diffrn_reflns_av_sigmaI/netI    0.0248
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            6688
_diffrn_reflns_theta_full        26.99
_diffrn_reflns_theta_max         26.99
_diffrn_reflns_theta_min         3.05
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.891743
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_density_diffrn    1.329
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.595
_exptl_crystal_size_mid          0.591
_exptl_crystal_size_min          0.395
_refine_diff_density_max         0.165
_refine_diff_density_min         -0.110
_refine_diff_density_rms         0.029
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.9(10)
_refine_ls_extinction_coef       0.028(3)
_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   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     183
_refine_ls_number_reflns         2879
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0324
_refine_ls_R_factor_gt           0.0301
_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^)+(0.0376P)^2^+0.1564P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0753
_refine_ls_wR_factor_ref         0.0769
_reflns_number_gt                2724
_reflns_number_total             2879
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol901349b_si_003.cif
_cod_data_source_block           z
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1504066